Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
SimpleSAMLphp SAML2 versions before 4.6.14 and simplesamlphp/saml2-legacy versions before 4.6.14 are vulnerable to XML external entity injection when parsing untrusted XML such as a SAMLResponse. An attacker who can submit SAML messages may bypass the NONET restriction using PHP stream filters, which could allow reading local files or making internal network connections; the source says remote code execution may be possible but this was not tested. Upgrade to version 4.6.14 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.3 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0043, the 37th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:28 UTC First seen by agentprime
- 31 Oct 2026, 14:28 UTC Confirmed by OSV