DEBIAN-CVE-2026-25537
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: validate_nbf = true), but the claim is not explicitly marked as required in required_spec_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.
DEBIAN-CVE-2026-25537
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-25537
rust-jsonwebtoken
Source reference: /affected/0/package/name
- Affected versions
- 8.2.0-1
Source reference:
/affected/0/versions8.3.0-1Source reference:
/affected/0/versions8.3.0-2Source reference:
/affected/0/versions8.3.0-3Source reference:
/affected/0/versions8.3.0-4Source reference:
/affected/0/versions8.3.0-5Source reference:
/affected/0/versions9.3.1-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
rust-jsonwebtoken
Source reference: /affected/1/package/name
- Affected versions
- 8.3.0-5
Source reference:
/affected/1/versions9.3.1-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
rust-jsonwebtoken
Source reference: /affected/2/package/name
- Affected versions
- 8.3.0-5
Source reference:
/affected/2/versions9.3.1-1Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-jsonwebtoken",
"purl": "pkg:deb/debian/rust-jsonwebtoken?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"8.2.0-1",
"8.3.0-1",
"8.3.0-2",
"8.3.0-3",
"8.3.0-4",
"8.3.0-5",
"9.3.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25537.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-jsonwebtoken",
"purl": "pkg:deb/debian/rust-jsonwebtoken?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"8.3.0-5",
"9.3.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25537.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-jsonwebtoken",
"purl": "pkg:deb/debian/rust-jsonwebtoken?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"8.3.0-5",
"9.3.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25537.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56248 · Revision 1
- Added to Heist Feed
- Publisher date