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CVE-2024-52806

HighPublished

SimpleSAMLphp SAML2 has an XXE in parsing SAML messages

Published: Dec 2, 2024
Updated: Dec 2, 2024
Assigning CNA: GitHub_M
Evidence observed: Aug 12, 2026

Primary CVSS

8.3/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

EPSS probability estimate

0.4%

Low · next 30 days

Percentile: 36.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2024-52806-PoCPoC
Proof-of-concept exploit for pre-auth XXE file read vulnerabilities in SimpleSAMLphp, enabling extraction of arbitrary local files from affected servers via crafted SAML requests.

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