Red Hat Security Advisory: pcs security update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited : upgrade to 3.0.0 soon.
Data as of 26 Oct 2026, 06:26 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 1.2% chance of exploitation in 30 days – higher than 68% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.0.0
Exploitation evidence
Disclosed: evidence found.
CVE published 28 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Upgrade rack to 3.0.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
RubyGemsrackpkg:gem/rackOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released updated pcs packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 8.8 Extended Update Support and related variants should apply the provided security update (pcs-0.10.15-4.el8_8.6) as detailed in the Red Hat advisory RHSA-2025:8279. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation steps are indicated by the vendor.
Description
The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities. Security Fix(es): * rubygem-rack: Unbounded-Parameter DoS in Rack::QueryParser (CVE-2025-46727) * tornado: Tornado Multipart Form-Data Denial of Service (CVE-2025-47287) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
- access.redhat.com/errata/RHSA-2025:8279 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2364966 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2366703 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_8279.json (opens in a new tab)