CVE-2026-89317
gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it
- Risk score
- 40/100
- CVSS
- 6.3 v4.0
- Exploit chance (30 days)
- 0.2%
- Published
- 23 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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.
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 6.3 medium
References
Original description
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.
Last activity 23 Oct 2026. Patch Forecast updates every hour.