DEBIAN-CVE-2026-25537
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-25537
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25537.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-25537
- Upstream
- Published
- 2026-02-04T22:15:59.807Z
- Modified
- 2026-02-12T11:17:48.100787Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
jsonwebtoken is a JWT lib in rust. Prior to version 10.3.0, there is a Type Confusion vulnerability in jsonwebtoken, specifically, in its claim validation logic. When a standard claim (such as nbf or exp) is provided with an incorrect JSON type (Like a String instead of a Number), the library’s internal parsing mechanism marks the claim as “FailedToParse”. Crucially, the validation logic treats this “FailedToParse” state identically to “NotPresent”. This means that if a check is enabled (like: validatenbf = true), but the claim is not explicitly marked as required in requiredspec_claims, the library will skip the validation check entirely for the malformed claim, treating it as if it were not there. This allows attackers to bypass critical time-based security restrictions (like “Not Before” checks) and commit potential authentication and authorization bypasses. This issue has been patched in version 10.3.0.
- References
Affected packages
Debian:12 / rust-jsonwebtoken
Package
- Name
- rust-jsonwebtoken
- Purl
- pkg:deb/debian/rust-jsonwebtoken?arch=source
Debian:13 / rust-jsonwebtoken
Package
- Name
- rust-jsonwebtoken
- Purl
- pkg:deb/debian/rust-jsonwebtoken?arch=source
Debian:14 / rust-jsonwebtoken
Package
- Name
- rust-jsonwebtoken
- Purl
- pkg:deb/debian/rust-jsonwebtoken?arch=source