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Back to active CVEs
Medium · CVSS 6.9CVE-2026-116585

Go JOSE: Panic during CBC-HMAC processingCVE-2026-116585

Answer in brief

CVE-2026-116585 records a Medium severity (CVSS 6.9) vulnerability in Go JOSE: Panic during CBC-HMAC processing. The current sources do not mark it as known exploited. The current feed maps go-jose/go-jose (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps go-jose/go-jose (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
go-jose/go-josegeneric<4.1.54.1.5

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for go-jose/go-jose.
  2. 2Review the reported fix. Update go-jose/go-jose to 4.1.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Go JOSE: Panics in JSON parsingSame go-jose/go-jose package
  • Go JOSE: DoS when parsing JWKs that contain RSA keysSame go-jose/go-jose package
  • snappy-java: JVM crash from unchecked ranges in Snappy.arrayCopy and SnappyOutputStream.rawWriteAlso CWE-129
  • Furnace through 0.6.8.3 Out-of-Bounds Write via FamiTracker GROOVES Block ImportAlso CWE-129

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-129
Source
CVE List V5
Source checked
Oct 26, 2026
References
5 linked sources
Open source record