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CVE-2017-18239
A time-sensitive equality check on the JWT signature in the JsonWebToken.validate method in main/scala/authentikat/jwt/JsonWebToken.scala…
Critical9.8EPSS 2.0%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
A time-sensitive equality check on the JWT signature in the JsonWebToken.validate method in main/scala/authentikat/jwt/JsonWebToken.scala in authentikat-jwt (aka com.jason-goodwin/authentikat-jwt) version 0.4.5 and earlier allows the supplier of a JWT token to guess bit after bit of the signature by repeating validation requests.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.0% · top 20% of all CVEs (2 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- n/a
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavencom.jason-goodwin:authentikat-jwt_2.12GHSA-3rhm-67j6-42jq (opens in a new tab)
References (3)
- https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/jasongoodwin/authentikat-jwt/issues/12 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/jasongoodwin/authentikat-jwt/pull/36 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-3rhm-67j6-42jq (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .