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Not in CISA KEV
HIGH severity

CVE-2024-52806

HIGHFix: simplesamlphp/saml2@5fd4ce4

CVE-2024-52806 is a high-severity (CVSS 8.3) XML External Entity (XXE) vulnerability in simplesamlphp/saml2. O3 Security confirms whether CVE-2024-52806 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

SimpleSAMLphp SAML2 has an XXE in parsing SAML messages

Also known asGHSA-pxm4-r5ph-q2m2
Published
Dec 2, 2024
Updated
Jul 15, 2026
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Jul 15, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

2 pkgs affected
🐘simplesamlphp/saml2🐘simplesamlphp/saml2-legacy

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. When loading an (untrusted) XML document, for example the SAMLResponse, it's possible to induce an XXE. This vulnerability is fixed in 4.6.14 and 5.0.0-alpha.18.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistsimplesamlphp/saml2all versions4.6.14
🐘Packagistsimplesamlphp/saml2-legacyall versions4.6.14

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for simplesamlphp/saml2. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update simplesamlphp/saml2 to 4.6.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-52806 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether CVE-2024-52806 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2024-52806. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. When loading an (untrusted) XML document, for example the SAMLResponse, it's possible to induce an XXE. This vulnerability is fixed in 4.6.14 and 5.0.0-alpha.18.
O3 Security · Impact-Aware SCA

Is CVE-2024-52806 in your dependencies?

O3 detects CVE-2024-52806 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.