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
Published Mar 18, 2018
9.8
CRITICALCVSS 3.0
EPSS 1.96%
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.
Affected products
No data.
- ≤ 0.4.5
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.96% (0.01963) | 79.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.03% (0.02032) | 78.46th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.28% (0.00284) | 68.97th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.28% (0.00284) | 67.77th | v3 (v2023.03.01) |
| Aug 8, 2023 | 0.28% (0.00284) | 64.49th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.27% (0.00273) | 63.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.38% (0.00383) | 68.80th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.88% (0.00884) | 25.39th | v1 |
| Jan 6, 2022 | 0.88% (0.00884) | 24.77th | v1 |
| Sep 1, 2021 | 0.88% (0.00884) | 59.15th | v1 |
| Apr 14, 2021 | 0.88% (0.00884) | 0.00th | v1 |
No CWE recorded.
References (5)
- https://github.com/advisories/GHSA-3rhm-67j6-42jq Advisory
- https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0 x_refsource_MISCPatchThird Party Advisory
- https://github.com/jasongoodwin/authentikat-jwt/issues/12 x_refsource_MISCIssue TrackingThird Party Advisory
- https://github.com/jasongoodwin/authentikat-jwt/pull/36 x_refsource_MISCIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-18239
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-3rhm-67j6-42jq | Advisory | |
| https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0 | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/jasongoodwin/authentikat-jwt/issues/12 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://github.com/jasongoodwin/authentikat-jwt/pull/36 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-18239 |
Change history (0)
No recorded changes yet.