TI-2026-29211 Aliases CVE-2026-40459 GHSA-3jrj-7493-fgq2

LDAP Injection in PAC4J

MEDIUM 41CWE-90Published 2026-04-17 · Updated 2026-04-17

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

PAC4J is vulnerable to LDAP Injection in multiple methods. A low-privileged remote attacker can inject crafted LDAP syntax into ID-based search parameters, potentially resulting in unauthorized LDAP queries and arbitrary directory operations. This issue was fixed in PAC4J versions 4.5.10, 5.7.10 and 6.4.1

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00608 49th percentileScored 2026-11-07

Fix Fixed PAC4J (PAC4J): 4.5.10, 5.7.10, 6.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
pac4j	PAC4J	4.0 to before 4.5.10; 5.0 to before 5.7.10; 6.0 to before 6.4.1	4.5.10, 5.7.10, 6.4.1	Patch available	CNA

PAC4J Vendorpac4j Affected 4.0 to before 4.5.10; 5.0 to before 5.7.10; 6.0 to before 6.4.1 Fixed in 4.5.10, 5.7.10, 6.4.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:pac4j:pac4j::::::::	4.0.0 to before 4.5.10; 5.0.0 to before 5.7.10; 6.0.0 to before 6.4.1	Vulnerable	pac4j

cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:* Versions 4.0.0 to before 4.5.10; 5.0.0 to before 5.7.10; 6.0.0 to before 6.4.1 Vulnerable ·pac4j

Remediation

Fix · CNA PAC4J (PAC4J) Fixed in 4.5.10, 5.7.10, 6.4.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-04-17
PAC4J — pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-29210 Cross-Site Request Forgery in PAC4JPriority LOW 30
Show all 2 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-40459
2026-10-03 Alias added: GHSA-3jrj-7493-fgq2
2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 2

TI-2021-20310 If an OpenID Connect provider supports the "none" algorithm (i.e., tokens with no… CVSS 3.1HIGH 7.5
TI-2026-29210 Cross-Site Request Forgery in PAC4J CVSS 4.0HIGH 7.0
TI-2019-08020 The SAML identifier generated within SAML2Utils.java was found to make use of the apache… CVSS 3.1MEDIUM 4.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences