6.9
MediumCVSS 4.0 · from GitHub_M
CVE-2026-116585
Go JOSE: Panic during CBC-HMAC processing
go-jose · CWE-129 · CWE-129Affectedgo-jose
FixNo fix listed yet.
PublishedOct 26, 21:06 · GitHub_M
ScoredOct 26 · 6.9 · GitHub_M
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:11 UTC
What we know
No known exploitation. CISA KEV, checked 22:11 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
Description
Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards. Prior to 4.1.5, decrypting untrusted JWE ciphertext with A128CBC-HS256, A192CBC-HS384, or A256CBC-HS512 can pass an empty ciphertext buffer to CBC-HMAC unpadding. Insufficient validation allows the empty buffer to be indexed, causing a panic and denial of service. Applications that decrypt attacker-controlled ciphertext with one of these content-encryption algorithms are affected. This issue is fixed in version 4.1.5.
From GitHub_M
Affected and fixed versions
ProductAffectedFixed ingo-jose< 4.1.5–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known