# SAML authentication bypass via Incorrect XPath selector

Advisory record · `GHSA-jw9c-mfg7-9rx2`

- **Identifiers:** `GHSA-jw9c-mfg7-9rx2` · `BIT-gitlab-2024-45409` · `CVE-2024-45409`
- **State:** Confirmed
- **Severity:** CVSS 10.0 Critical
- **Critical:** Yes: CVSS 9+, CVSS 7+ and EPSS
- **Weakness (CWE):** [CWE-347](https://cwe.mitre.org/data/definitions/347.html)
- **Tags:** [Weak cryptography or TLS](https://agentprime.io/advisories/tag/weak-crypto.md)
- **Published:** 10 Sept 2024
- **Updated:** 7 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 10 Sept 2024, 19:42 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 10.0: 9.0 or more.
- CVSS score 10.0 (7.0 or more) and EPSS 0.11 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `ruby-saml` (RubyGems): affected `<1.12.3 || >=1.13.0, <1.17.0`; fixed in `1.12.3`, `1.17.0`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 10.0 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.11, the 95th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 10 Sept 2024, 18:50 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2024-45409)
- 10 Sept 2024, 19:15 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2024-45409)
- 31 Oct 2026, 15:16 UTC: First seen by agentprime
- 31 Oct 2026, 15:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-jw9c-mfg7-9rx2)

## Sources

- [GitHub Advisory Database: GHSA-jw9c-mfg7-9rx2](https://github.com/advisories/GHSA-jw9c-mfg7-9rx2)
- [OSV: GHSA-jw9c-mfg7-9rx2](https://osv.dev/vulnerability/GHSA-jw9c-mfg7-9rx2)
- <https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-jw9c-mfg7-9rx2>
- <https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-cvp8-5r8g-fhvq>
- <https://nvd.nist.gov/vuln/detail/CVE-2024-45409>
- <https://github.com/SAML-Toolkits/ruby-saml/commit/1ec5392bc506fe43a02dbb66b68741051c5ffeae>
- <https://github.com/SAML-Toolkits/ruby-saml/commit/4865d030cae9705ee5cdb12415c654c634093ae7>
- <https://github.com/omniauth/omniauth-saml/commit/4274e9d57e65f2dcaae4aa3b2accf831494f2ddd>
- <https://github.com/SAML-Toolkits/ruby-saml>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/omniauth-saml/CVE-2024-45409.yml>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/omniauth-saml/GHSA-cvp8-5r8g-fhvq.yml>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-saml/CVE-2024-45409.yml>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-jw9c-mfg7-9rx2>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-jw9c-mfg7-9rx2/>. Everything for agents: <https://agentprime.io/llms.txt>.