Public proof of conceptFix available

CVE-2024-52806

Q: Is CVE-2024-52806 actively exploited?

Active exploitation of CVE-2024-52806 has not been confirmed. Its EPSS score was 0.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2024-52806?

CVE-2024-52806 has a CVSS v3 base score of 8.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.

A public proof of concept exists; no exploitation attested.

Published2024-12-02
Fixed in5.0.0-alpha.18 · 4.6.14
WeaknessCWE-611

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2024-12-0217:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-52806?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-52806?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · OSV

Simplesamlphp saml2

Branch	Affected	Fixed in	Source
5.0	< 5.0.0-alpha.18	5.0.0-alpha.18	CISA-ADP
4.6	< 4.6.14	4.6.14	CISA-ADP · OSV
5.0	≤ 5.0.0-alpha.1	no fix published	CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Simplesamlphp saml2 to 5.0.0-alpha.18 · 4.6.14

Detection

read 2026-10-23 19:24 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedheartlesseorg-dot/CVE-2024-52806-PoC

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2024-12-02
OpenCVESSVC decisionnone—
CNACVSS 3.18.3read 2026-10-23
CNAweakness (CWE)CWE-611read 2026-10-23
FIRST EPSSEPSS score0.4 %2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Published: 2024-12-02
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2024-52806?

Is CVE-2024-52806 actively exploited?

Active exploitation of CVE-2024-52806 has not been confirmed. Its EPSS score was 0.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-52806?

CVE-2024-52806 has a CVSS v3 base score of 8.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.

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