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PatchSiren cyber security CVE debrief

CVE-2026-46490 tngan CVE debrief

CVE-2026-46490 is a HIGH severity vulnerability in samlify, a Node.js library for SAML single sign-on. The vulnerability allows for privilege escalation when attributes are used for authorization (roles/groups).

Vendor
tngan
Product
samlify
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Users of samlify library for SAML single sign-on, especially those using attributes for authorization.

Technical summary

Prior to version 2.13.0, samlify's template substitution only escapes attribute contexts. Values inserted into element text (e.g., <saml:AttributeValue>) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new <saml:Attribute> elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to version 2.13.0 or later of the samlify library.

Evidence notes

The vulnerability has been patched in version 2.13.0.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46490 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46490

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46490 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46490

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.