# simplesamlphp/saml2 (Packagist) vulnerabilities

9 known vulnerabilities (4 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://packagist.org/packages/simplesamlphp/saml2

## Advisories (9)

### [CVE-2026-49289](https://cve.now/CVE-2026-49289): SimpleSAMLphp SAML2: Possible DoS via XPath Transform

- Severity: High 7.5
- Published: Aug 19, 2026
- Affected: from 4.20.0, fixed in 4.20.3; fixed in 4.19.3.

### [CVE-2026-49283](https://cve.now/CVE-2026-49283): SimpleSAMLphp HTTP-Artifact TLS validator confusion allows cross-IdP authentication bypass

- Severity: High 8.7
- Published: Aug 19, 2026
- Affected: from 6.0.0, fixed in 6.2.1; from 5.0.0, fixed in 5.0.6; from 4.20.0, fixed in 4.20.2; fixed in 4.19.3.

### [CVE-2025-27773](https://cve.now/CVE-2025-27773): SimpleSAMLphp SAML2 library has incorrect signature verification for HTTP-Redirect binding

- Severity: High 8.6
- Published: Mar 11, 2025
- Affected: fixed in 4.17.0; from 5.0.0-alpha.1, fixed in 5.0.0-alpha.20.

### [CVE-2024-52806](https://cve.now/CVE-2024-52806): SimpleSAMLphp SAML2 has an XXE in parsing SAML messages

- Severity: High 8.3
- Published: Dec 2, 2024
- Affected: fixed in 4.6.14.

### [CVE-2023-49087](https://cve.now/CVE-2023-49087): Validation of SignedInfo

- Severity: Medium 6.8
- Published: Nov 30, 2023
- Affected: from 5.0.0-alpha.12, fixed in 5.0.0-alpha.13.

### [CVE-2018-7711](https://cve.now/CVE-2018-7711): HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation…

- Severity: Unrated
- Published: Mar 5, 2018
- Affected: fixed in 1.10.6; from 2.0, fixed in 2.3.8; from 3.0, fixed in 3.1.4.

### [CVE-2018-7644](https://cve.now/CVE-2018-7644): The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions…

- Severity: Unrated
- Published: Mar 5, 2018
- Affected: fixed in 1.10.5; from 2.0, fixed in 2.3.7; from 3.0, fixed in 3.1.3.

### [CVE-2018-6519](https://cve.now/CVE-2018-6519): The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service…

- Severity: Unrated
- Published: Feb 2, 2018
- Affected: fixed in 1.10.4; from 2.0, fixed in 2.3.5; from 3.0, fixed in 3.1.1.

### [CVE-2016-9814](https://cve.now/CVE-2016-9814): The validateSignature method in the SAML2\\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library before 1.9.1, 1.10.x…

- Severity: Unrated
- Published: Feb 16, 2017
- Affected: from 1.10, fixed in 1.10.3; fixed in 1.8.1; from 1.9.0, fixed in 1.9.1; from 2.0, fixed in 2.3.3.

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