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TI-2026-79601 Aliases CVE-2026-89317

Eclipse KeyPont GOSE accepts JWS tokens with unenforced crit header

Priority MEDIUM 61CWE-1288Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-347.

Summary

Eclipse KeyPont - GOSE versions from 0.7.3 through 0.13.0-rc1 and versions before 1.0.0-rc4 are affected. The JWS verifier parses the crit header but never checks it, so it accepts tokens that list critical extensions it does not understand (CWE-347). A remote attacker without privileges can send such a token, but the attack is hard to carry out and its impact is limited to integrity.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00217 12th percentileScored 2026-11-07
Fix Fixed Eclipse KeyPont - GOSE (Eclipse Foundation): 1.0.0-rc4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eclipse FoundationEclipse KeyPont - GOSE0.7.3 – 0.13.0-rc1—No fix listedCNA
Eclipse FoundationEclipse KeyPont - GOSEbefore 1.0.0-rc41.0.0-rc4Patch availableCNA
  • Eclipse KeyPont - GOSE VendorEclipse Foundation Affected 0.7.3 – 0.13.0-rc1 Fixed in — No fix listed CNA
  • Eclipse KeyPont - GOSE VendorEclipse Foundation Affected before 1.0.0-rc4 Fixed in 1.0.0-rc4 Patch available CNA

Remediation

Upgrade Eclipse KeyPont - GOSE to 1.0.0-rc4, which fixes the flaw. The sources list no fixed version for Eclipse KeyPont - GOSE 0.7.3 through 0.13.0-rc1.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA Eclipse KeyPont - GOSE (Eclipse Foundation) Fixed in 1.0.0-rc4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Eclipse KeyPont - GOSE 1.0.0-rc4

    7 records Highest priority Priority HIGH 3 HIGH, 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-79602 Panic on malformed JWE IV length in Eclipse KeyPont GOSEPriority HIGH 70
    • TI-2026-79599 Panic in Eclipse KeyPont - GOSE JWT claim marshallingPriority HIGH 70
    • TI-2026-79598 Slow duplicate key_ops check in Eclipse KeyPont GOSE exhausts CPUPriority HIGH 70
    Show all 7 records →

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-89317
  2. 2026-10-23 Priority changed: MEDIUM → LOW
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: LOW → MEDIUM

References

Other 1

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2026-81947 Unauthenticated command injection in Eclipse Che che-machine-exec CVSS 3.1CRITICAL 9.8
  • TI-2026-13216 CWE-863: ABAC authorization bypass via trailing slash route normalization in Eclipse BaSyx Go Components CVSS 3.1CRITICAL 9.8
  • TI-2026-06514 Path traversal in Eclipse BaSyx CVSS 3.1CRITICAL 10.0
  • TI-2026-01382 In the Eclipse Theia Website repository, the GitHub Actions workflow… CVSS 3.1CRITICAL 10.0
  • TI-2026-74697 Authentication bypass in Eclipse Jetty EthereumAuthenticator CVSS 4.0CRITICAL 9.3
See all 466 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences