---
id: "CVE-2026-123552"
page: "https://infrastack.ai/live/CVE-2026-123552"
kind: "vulnerability"
aliases: ["CVE-2026-123552"]
title: "OpenAM: certificate revocation checks let attackers reach internal hosts"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["certificate-auth", "openam", "other", "self-hosted"]
not_affected_if: ["no-certificate-auth", "version-16.1.4-or-later"]
published_at: "2026-11-08T02:16:46+00:00"
first_seen_at: "2026-11-08T02:21:11+00:00"
updated_at: "2026-11-08T02:24:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123552", "first_seen_at": "2026-11-08T02:21:11+00:00"}]
exploit_sources: []
---

# OpenAM: certificate revocation checks let attackers reach internal hosts

Link for people: https://infrastack.ai/live/CVE-2026-123552 (this .md is for agents)

OpenAM fetches certificate revocation lists from addresses named inside a presented certificate without restricting the destination or verifying the list's signature. An attacker holding a certificate from a trusted certificate authority can make the server request internal hosts, read stored CRL credentials, overwrite revocation data, and tie up authentication threads.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed OpenAM version; `16.1.4` or later is not affected by the description given.
- Look for certificate-based authentication with CRL checking enabled in the OpenAM configuration.

## Fix

- OpenAM before `16.1.4`: move to `16.1.4` or later.

## Timeline

- 2026-11-08T02:21:11+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123552

## Documents

- [advisory] Vendor advisory: github.com https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-g5vw-v384-gw9v
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/openam-before-16.1.4-ssrf-and-crl-tampering-via-certificate-crl-distribution-point

## From the sources

OpenAM before 16.1.4 contains a server-side request forgery vulnerability in certificate CRL checking that fetches CRLs from the distribution point named in a presented certificate without restricting the destination or verifying the downloaded CRL's signature. Attackers holding a trusted-CA-chained certificate can make OpenAM request internal hosts, capture configured CRL update credentials, overwrite stored revocation data to block certificate authentication for that CA, and tie up authentication threads.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_