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  4. CVE 2026 116587 go jose dos when parsing jwks that contain rsa
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Back to active CVEs
High · CVSS 7.5CVE-2026-116587

Go JOSE: DoS when parsing JWKs that contain RSA keysCVE-2026-116587

Answer in brief

CVE-2026-116587 records a High severity (CVSS 7.5) vulnerability in Go JOSE: DoS when parsing JWKs that contain RSA keys. 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
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. 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<4.1.64.1.6

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 4.1.6 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
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 4.1.6, go-jose parses attacker-controlled RSA modulus and prime values from JWKs without enforcing size and consistency bounds before passing them to crypto/rsa.PrivateKey.Validate. On Go 1.24 and later, crafted large or degenerate RSA parameters can make that validation consume cubic CPU time, allowing remote denial of service in applications that parse JWKs from untrusted sources. This issue is fixed in version 4.1.6.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Go JOSE: Panic during CBC-HMAC processingSame go-jose/go-jose package
  • Go JOSE: Panics in JSON parsingSame go-jose/go-jose package
  • Tornado: Quadratic CPU usage when parsing HTTP headers with line foldingAlso CWE-407
  • Autobahn Python: permessage-brotli inflates a whole frame before maxMessagePayloadSize is checked (incomplete fix of GHSA-hxp9-w8x3-p566)Also CWE-770
  • Seroval `fromJSON`/`fromCrossJSON` denial of service via unvalidated array node lengthAlso CWE-770

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-407, CWE-770
Source
CVE List V5
Source checked
Oct 26, 2026
References
3 linked sources
Open source record