CVE-2025-23184: Apache CXF · Uncontrolled Resource Consumption
Affects Apache CXFSource CVE Database V5
Not known to be exploited · CVSS 5.9 Medium.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 2.2% chance of exploitation in 30 days – higher than 82% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 21 Jan 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 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Mavenorg.apache.cxf/cxf-corepkg:maven/org.apache.cxf/cxf-coreOther 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
1. Upgrade Apache CXF to versions 3.5.10, 3.6.5, or 4.0.6 or later where the issue is fixed. 2. Implement proactive monitoring of disk usage, especially in directories used for temporary files by Apache CXF, to detect abnormal growth early. 3. Configure system-level quotas or limits on temporary file storage to prevent full disk exhaustion. 4. Review and audit application logs and resource usage patterns to identify potential edge cases triggering unclosed CachedOutputStream instances. 5. In environments where immediate upgrade is not feasible, consider deploying network-level protections to limit exposure and rate-limit requests to reduce resource consumption. 6. Educate development and operations teams about the vulnerability and ensure secure coding and resource management practices in services using Apache CXF.
Description
A potential denial of service vulnerability is present in versions of Apache CXF before 3.5.10, 3.6.5 and 4.0.6. In some edge cases, the CachedOutputStream instances may not be closed and, if backed by temporary files, may fill up the file system (it applies to servers and clients).
References
- lists.apache.org/thread/lfs8l63rnctnj2skfrxyys7v8fgnt122 (opens in a new tab)
- openwall.com/lists/oss-security/2025/01/20/3 (opens in a new tab)
- security.netapp.com/advisory/ntap-20250214-0003/ (opens in a new tab)
- vicarius.io/vsociety/posts/cve-2025-23184-detect-apache-cxf-vulnerability (opens in a new tab)
- vicarius.io/vsociety/posts/cve-2025-23184-mitigate-apache-cxf-vulnerability (opens in a new tab)