Golang

Exploited now

None of this vendor's CVEs are on CISA's known-exploited list.

Recent

• 7.5HighSep 2, 2026Golang crypto Denial of serviceCVE-2026-78662Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.
• 7.5HighSep 2, 2026Golang crypto Denial of serviceCVE-2026-56855Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.
• 5.3MediumJul 8, 2026Golang go Information disclosureCVE-2026-42505Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.
• 7.8HighJul 8, 2026Golang go Path traversal / file handlingCVE-2026-39822On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing outside of the root.
• 7.5HighJun 26, 2026Golang tiff Memory corruptionCVE-2026-46604The TIFF decoder can panic when decoding an invalid image with an out-of-bounds strip offset.
• 6.1MediumMay 22, 2026Golang net XSSCVE-2026-42506Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
• 6.1MediumMay 22, 2026Golang net XSSCVE-2026-42502Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
• 9.6CriticalMay 22, 2026Golang net Privilege escalationCVE-2026-39821The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to U
• 6.1MediumMay 22, 2026Golang net XSSCVE-2026-27136Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
• 6.1MediumMay 22, 2026Golang net XSSCVE-2026-25681Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
• 6.5MediumMay 22, 2026Golang net Denial of serviceCVE-2026-25680Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.
• 5.3MediumMay 22, 2026Golang cryptoCVE-2026-46598For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.
• 7.5HighMay 22, 2026Golang cryptoCVE-2026-46597An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.
• 10.0CriticalMay 22, 2026Golang crypto Auth bypass / access controlCVE-2026-46595Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.
• 9.1CriticalMay 22, 2026Golang crypto Crypto / certificateCVE-2026-42508Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.
• 5.3MediumMay 22, 2026Golang crypto Crypto / certificateCVE-2026-39835SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.
• 9.1CriticalMay 22, 2026Golang crypto Memory corruptionCVE-2026-39834When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.
• 9.1CriticalMay 22, 2026Golang crypto Auth bypass / access controlCVE-2026-39833The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.
• 9.1CriticalMay 22, 2026Golang crypto DeserializationCVE-2026-39832When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
• 9.1CriticalMay 22, 2026Golang crypto Auth bypass / access controlCVE-2026-39831The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.
• 9.1CriticalMay 22, 2026Golang crypto Memory corruptionCVE-2026-39830A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.
• 7.5HighMay 22, 2026Golang crypto Crypto / certificateCVE-2026-39829The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.
• 6.3MediumMay 22, 2026Golang crypto Crypto / certificateCVE-2026-39828When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
• 6.5MediumMay 22, 2026Golang cryptoCVE-2026-39827An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
• 7.5HighMay 7, 2026Golang go Crypto / certificateCVE-2026-42501A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy (GOMODPROXY) or checksum database (GOSUMDB). A malicious module proxy can serve altered versions of the Go toolchain. When selecting a different version of the Go toolchain than the currently installed toolchain (due to the GOTOOLCHAIN environment variable, or a go.work or go.mod with a toolchain
• 7.5HighMay 7, 2026Golang go Denial of serviceCVE-2026-42499Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
• 7.5HighMay 7, 2026Golang go Memory corruptionCVE-2026-39836The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).
• 6.1MediumMay 7, 2026Golang goCVE-2026-39826If a trusted template author were to write a <script> tag containing an empty 'type' attribute or a 'type' attribute with an ASCII whitespace, the execution of the template would incorrectly escape any data passed into the <script> block.
• 5.3MediumMay 7, 2026Golang goCVE-2026-39825ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a que
• 6.1MediumMay 7, 2026Golang go XSSCVE-2026-39823CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.
• 7.5HighMay 7, 2026Golang go Denial of serviceCVE-2026-39820Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
• 5.3MediumMay 7, 2026Golang go Path traversal / file handlingCVE-2026-39819The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.
• 5.9MediumMay 7, 2026Golang go Memory corruptionCVE-2026-39817The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem.
• 7.5HighMay 7, 2026Golang go Denial of serviceCVE-2026-33814When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.
• 7.5HighMay 7, 2026Golang go Memory corruptionCVE-2026-33811When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
• 8.8HighMay 6, 2026Golang goplsCVE-2026-42503gopls by default communicates via pipe. However, -port and -listen flags are supported as means of debugging. If -listen is given a value without an explicit host (e.g. :8080), or -port is used, gopls will listen on 0.0.0.0.  As a result, users might inadvertently cause gopls to bind 0.0.0.0. This can allow a malicious party on the same network to execute code arbitrarily via gopls.
• 7.5HighApr 21, 2026Golang imageCVE-2026-33813Parsing a WEBP image with an invalid, large size panics on 32-bit platforms.
• 6.1MediumApr 21, 2026Golang image Denial of serviceCVE-2026-33812Parsing a malicious font file can cause excessive memory allocation.
• 8.2HighApr 8, 2026Golang go Crypto / certificateCVE-2026-33810When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.
• 6.1MediumApr 8, 2026Golang go XSSCVE-2026-32289Context was not properly tracked across template branches for JS template literals, leading to possibly incorrect escaping of content when branches were used. Additionally template actions within JS template literals did not properly track the brace depth, leading to incorrect escaping being applied. These issues could cause actions within JS template literals to be incorrectly or improperly escaped, leading to XSS vulnerabilities.
• 5.5MediumApr 8, 2026Golang go Denial of serviceCVE-2026-32288tar.Reader can allocate an unbounded amount of memory when reading a maliciously-crafted archive containing a large number of sparse regions encoded in the "old GNU sparse map" format.
• 7.5HighApr 8, 2026Golang go Denial of serviceCVE-2026-32283If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.
• 6.4MediumApr 8, 2026Golang go Path traversal / file handlingCVE-2026-32282On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root. The Linux fchmodat syscall silently ignores the AT_SYMLINK_NOFOLLOW flag, which Root.Chmod uses to avoid symlink traversal. Root.Chmod checks its target before acting and returns an error if the target is a symlink lying outside the root, so the impact is limited to cases where the target is replaced
• 7.5HighApr 8, 2026Golang go Crypto / certificateCVE-2026-32281Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.
• 7.5HighApr 8, 2026Golang go Denial of serviceCVE-2026-32280During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls.
• 7.1HighApr 8, 2026Golang go Memory corruptionCVE-2026-27144The compiler is meant to unwrap pointers which are the operands of a memory move; a no-op interface conversion prevented the compiler from making the correct determination about non-overlapping moves, potentially leading to memory corruption at runtime.
• 9.8CriticalApr 8, 2026Golang go Memory corruptionCVE-2026-27143Arithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid indexing to occur at runtime, potentially leading to memory corruption.
• 8.8HighApr 8, 2026Golang go Auth bypass / access controlCVE-2026-27140SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.
• 5.3MediumMar 25, 2026Golang tiff Path traversal / file handlingCVE-2026-33809A maliciously crafted TIFF file can cause image decoding to attempt to allocate up 4GiB of memory, causing either excessive resource consumption or an out-of-memory error.
• 6.1MediumMar 6, 2026Golang go XSSCVE-2026-27142Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value "refresh". A new GODEBUG setting has been added, htmlmetacontenturlescape, which can be used to disable escaping URLs in actions in the meta content attribute which follow "url=" by setting htmlmetacontenturlescape=0.

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Top products

• go38 CVEs in the last year, 2 critical
• crypto17 CVEs in the last year, 7 critical
• net6 CVEs in the last year, 1 critical
• tiff2 CVEs in the last year
• image2 CVEs in the last year
• gopls1 CVE in the last year

Advisories

Official advisories from the last 90 days that name this vendor's CVEs.

• Kubernetes · Apr 23, 2021CVE-2021-3121CVE-2021-3121