Red Hat Ansible Automation Platform 2.5 for…: Uncontrolled Resource Consumption
CVE-2025-69534 is a high-severity uncontrolled resource consumption vulnerability in Red Hat Ansible Automation Platform 2.5 for RHEL 8 from Red Hat, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.66% chance of exploitation within 30 days, higher than 52% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Red Hat Ansible Automation Platform 2.5 for RHEL 8 you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
Version data comes from the organisation that assigned the CVE; 5 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.1 | 7.5 | High | CISA (ADP) |
| CVSS 3.1 | 8.2 | High | CNA |
Official description
Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsing. Because Python-Markdown does not catch this exception, any application that processes attacker-controlled Markdown may crash. This enables remote, unauthenticated Denial of Service in web applications, documentation systems, CI/CD pipelines, and any service that renders untrusted Markdown. The issue was acknowledged by the vendor and fixed in version 3.8.1. This issue causes a remote Denial of Service in any application parsing untrusted Markdown, and can lead to Information Disclosure through uncaught exceptions.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource.
How developers prevent this class of flaw
- Ensure that protocols have specific limits of scale placed on them.
- Ensure that all failures in resource allocation place the system into a safe posture.
More Uncontrolled Resource Consumption vulnerabilities (CWE-400)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- openwall.com/lists/oss-security/2026/03/06/4Mailing List, Third Party Advisory
Technical write-ups (may include proof of concept)
- github.com/Python-Markdown/markdown/issues/1534Exploit, Issue Tracking
Other references
- github.com/Python-Markdown/markdownProduct
- github.com/Python-Markdown/markdown/actions/runs/15736122892Product
- access.redhat.com/errata/RHSA-2026:10184
- access.redhat.com/errata/RHSA-2026:13508
- access.redhat.com/errata/RHSA-2026:13512
- access.redhat.com/errata/RHSA-2026:13826
- access.redhat.com/errata/RHSA-2026:14835
- access.redhat.com/errata/RHSA-2026:14873
- access.redhat.com/errata/RHSA-2026:14874
- access.redhat.com/errata/RHSA-2026:19155
- access.redhat.com/errata/RHSA-2026:19366
- access.redhat.com/errata/RHSA-2026:20674
- access.redhat.com/errata/RHSA-2026:20676
- access.redhat.com/errata/RHSA-2026:20677
- access.redhat.com/errata/RHSA-2026:9742
Other vulnerabilities in Red Hat Ansible Automation Platform 2.5 for RHEL 8
- 9.9 Critical severity
- 7.1 High severity
- 7.6 High severity
- 8.7 High severity
- 8.7 High severity
- 9.1 Critical severity
Recent Uncontrolled Resource Consumption vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.6 High severity
- 7.5 High severity
- 9.1 Critical severity
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