CVE-2026-40458
Cross-Site Request Forgery in PAC4J
En bref
- Source
- NVD
- EPSS
- EPSS 0.17 % · centile 6 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- CERT-PL
- Statut NVD
- Analyzed
Description
PAC4J is vulnerable to Cross-Site Request Forgery (CSRF). A malicious attacker can craft a specially designed website which, when visited by a user, will automatically submit a forged cross-site request with a token whose hash collides with the victim's legitimate CSRF token. Importantly, the attacker does not need to know the victim’s CSRF token or its hash prior to the attack. Collisions in the deterministic String.hashCode() function can be computed directly, reducing the effective token's security space to 32 bits. This bypasses CSRF protection, allowing profile updates, password changes, account linking, and any other state-changing operations to be performed without the victim's consent. This issue was fixed in PAC4J versions 5.7.10 and 6.4.1
Faiblesses (CWE)
- CWE-352 — Falsification de requête inter-site (CSRF)
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 4.0 | HIGH 7.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | CERT-PL |
| CVSS 4.0 | HIGH 7.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · cvd@cert.pl (Secondary) |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N | NVD · nvd@nist.gov (Primary) |
Avis
- GHSA-xw5c-jc7x-gf75 — PAC4J has a Cross-Site Request Forgery (CSRF) Vulnerability
Références européennes
- ENISA EUVD · EUVD-2026-23421
- GCVE · GCVE-0-2026-40458
Avis du CERT-FR
- CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*≥ 5.0.0 < 5.7.10cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*> 6.0.0 < 6.4.1
Produits affectés
| Produit | Versions |
|---|---|
| PAC4J · PAC4J | affected 5.0 < 5.7.10 ; affected 6.0 < 6.4.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |