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CVE-2026-29000: pac4j-jwt 4.0 to before 4.5.9, 5.0 to before 5.7.9, 6.0 to before 6.3.3
CVE-2026-29000. CVSS 3.1 base score 9.1 (CRITICAL, Vendor/CNA). EPSS 0.00502 (percentile 0.40927), scored 2026-10-06.
Affected technology
pac4j-jwt · 4.0 to before 4.5.9, 5.0 to before 5.7.9, 6.0 to before 6.3.3
pac4j
Description’s affected range: versions prior to 4.5.9, 5.7.9, and 6.3.3
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required
What an attacker can do
The source says pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attackers to forge authentication tokens. Vendor/CNA’s CVSS 4.0 assessment (base score 9.3/10) rates confidentiality and integrity impact as high; availability impact as none.
- CWE
- CWE-347
- CCR priority
- 36.5 /100 (P4)
- CVSS 3.1
- 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · Vendor/CNA
- EPSS
- 0.00502 · percentile 0.41037 · 2026-10-08
- KEV
- no
Provenance
- FIRST EPSS daily exploit-probability · Source record · observed 2026-10-08 17:36:22.845483+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-08 17:32:11.049884+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-29000.html