Detections
Analytics

SCA: security update for simplesamlphp/saml2, simplesamlphp/saml2-legacy (GHSA-6929-8p9f-26jx)

high Tenable Self-Hosted Container Security Plugin ID 445680

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. Prior to versions
 4.19.3, 4.20.2, 5.0.6, and 6.2.1, the HTTPArtifact::receive() flow can treat an unsigned embedded SAML
 Response as cryptographically valid for the wrong identity provider. SOAPClient::addSSLValidator()
 attaches a TLS-based validator to the outer SOAP ArtifactResponse, while the embedded Response receives a
 validator that delegates to the outer message and is later checked against metadata selected from the
 embedded response issuer rather than necessarily the artifact issuer. SOAPClient::validateSSL() returns
 normally when the TLS public key does not match the key being validated, and SAML2\Message::validate()
 treats a validator call that does not throw as successful. In a multi-IdP federation, a malicious or
 lower-trust IdP can therefore provide an ArtifactResponse containing an unsigned Response that claims a
 higher-trust victim IdP as issuer and authenticate as arbitrary users with attacker-chosen assertion
 attributes, NameID, and session data. This issue is fixed in versions 4.19.3, 4.20.2, 5.0.6, and 6.2.1.
 (CVE-2026-49283)

Solution

Update the simplesamlphp/saml2 library and its related packages to version 4.19.3 or later.

See Also

https://github.com/advisories/GHSA-6929-8p9f-26jx

Plugin Details

Severity: High

ID: 445680

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 8/5/2026

Updated: 8/20/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 57.83

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.7

Temporal Score: 5.7

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:N

CVSS Score Source: CVE-2026-49283

CVSS v3

Risk Factor: High

Base Score: 8.7

Temporal Score: 7.6

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/2/2026

Vulnerability Publication Date: 7/2/2026

Reference Information

CVE: CVE-2026-49283

cwe: CWE-295