Description
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | simplesamlphp | 1.15.2-1 | — |
| Debian 12 | simplesamlphp | 1.15.2-1 | — |
| Debian 9 | simplesamlphp | 1.14.11-1+deb9u1 | DSA-4127-1 |
| Debian 8 | simplesamlphp | 1.13.1-2+deb8u1 | DSA-4127-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | simplesamlphp | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | simplesamlphp/saml2 | < 1.10.4 | 1.10.4 | GHSA-hhm8-2j4g-mpgg |
| Packagist | simplesamlphp/saml2 | >= 2.0, < 2.3.5 | 2.3.5 | GHSA-hhm8-2j4g-mpgg |
| Packagist | simplesamlphp/saml2 | >= 3.0, < 3.1.1 | 3.1.1 | GHSA-hhm8-2j4g-mpgg |
Advisories 1
- DSA-4127-1 simplesamlphp - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://simplesamlphp.org/security/201801-01
- DSA-4127 vendor-advisory