CVE-2018-6519: SimpleSAMLphp SAML2 library Regular Expression Denial of Service vulnerability

high Affects simplesamlphp/saml2. Feed 2026.10.29.1, updated 2026-10-28; published 2022-05-14; advisory modified 2024-04-25.

SimpleSAMLphp SAML2 library Regular Expression Denial of Service vulnerability

Package: simplesamlphp/saml2 Composer
Affected versions: <1.10.4 or >=2.0 and <2.3.5 or >=3.0 and <3.1.1
Fixed in: 1.10.4, 2.3.5, 3.1.1
Severity: high CVSS 7.5
Exploitation: not on CISA KEV · EPSS 2% (77.1th percentile)
Published: 2022-05-14
Source: osv.dev

References

CWE-74

NVD record simplesamlphp/saml2 advisories

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Related advisories

CVE-2016-9814 critical SimpleSAMLphp SAML2 spoof SAML responses same package: simplesamlphp/saml2
CVE-2018-7644 high SimpleSAMLphp Improper Verification of Cryptographic Signature same package: simplesamlphp/saml2
CVE-2018-7711 high SimpleSAMLphp saml2 incorrect signature validation same package: simplesamlphp/saml2
CVE-2026-49289 high SimpleSAMLphp has Possible DoS via XPath Transform same package: simplesamlphp/saml2
CVE-2026-49283 high SimpleSAMLphp HTTP-Artifact TLS validator confusion allows cross-IdP authentication bypass same package: simplesamlphp/saml2
CVE-2024-52806 high SimpleSAMLphp SAML2 has an XXE in parsing SAML messages same package: simplesamlphp/saml2