CVE-2026-19363 lmammino oidc-authorizer Lambda Authorizer handler.rs log file
Remote attackers can obtain sensitive credentials and JWT claims from CloudWatch Logs due to verbose logging in the OIDC Lambda Authorizer.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19363?
CVE-2026-19363 is a medium-severity vulnerability in lmammino oidc-authorizer, published on 9 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in lmammino oidc-authorizer up to 0.4.0. Impacted is an unknown function of the file src/handler.rs of the component Lambda Authorizer. The manipulation results in sensitive information in log files. The attack can be executed remotely. `src/handler.rs` logs raw Authorization header values and complete bearer tokens/JWTs on authentication failure paths, potentially exposing credentials through CloudWatch Logs. `src/models.rs` serializes the complete validated JWT claims set with `serde_json::to_string(token_claims).unwrap()` and propagates it through `context["jwtClaims"]` to downstream integrations. This code performs serialization, not deserialization, and does not process attacker-controlled `jwtClaims` input. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-19363?
How do I fix CVE-2026-19363?
No fix has been published for CVE-2026-19363 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19363 being exploited?
There is no known exploitation of CVE-2026-19363 in the wild and no public exploit code.
Sources
Also known as GHSA-fwrx-97hw-xg2r.