CVE-2026-89317 JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)
Medium 6.3
Published
Updated
Check this codebase for CVE-2026-89317 and fix it if it is affected.
What it is: CVE-2026-89317 is a medium-severity vulnerability in Eclipse KeyPont - GOSE, published on 23 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-89317 in the wild and no public exploit code.
Affected product: Eclipse KeyPont - GOSE. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-89317/ (Markdown: https://insights.sbomify.com/CVE-2026-89317/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-89317?
CVE-2026-89317 is a medium-severity vulnerability in Eclipse KeyPont - GOSE, published on 23 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-89317?
How do I fix CVE-2026-89317?
No fix has been published for CVE-2026-89317 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-89317 being exploited?
There is no known exploitation of CVE-2026-89317 in the wild and no public exploit code.
Sources
Also known as GHSA-445r-fpvv-hgwc.