roxmltree through 0.21.1 Denial of Service via Quadratic Parsing
Priority MEDIUM 45CWE-407Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-407.
Summary
roxmltree through 0.21.1 performs quadratic-time attribute and namespace validation during XML parsing without limits on attribute count. Attackers can craft XML documents with tens of thousands of attributes on a single element to consume excessive CPU time and cause denial of service.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0063 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| RazrFalcon | roxmltree | up to 0.21.1 | — | No fix listed | CNA |
- roxmltree VendorRazrFalcon Affected up to 0.21.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Logging Subsystem for Red Hat OpenShift | Affected | No fix planned: Will not fix |
| Red Hat Trusted Artifact Signer | Affected | No fix yet |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet |
Not affected: 3 products
- Confidential Compute Attestation
- Red Hat Enterprise Linux 10
- Red Hat Hardened Images
Timeline
- 2026-10-02 Threatist record created from CVE-2026-92987
- 2026-10-03 Alias added: GHSA-5fxw-8768-v85x
- 2026-10-08 Affected versions changed · Red Hat
- 2026-10-15 Affected versions changed · Red Hat
- 2026-10-28 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2026-92987 · CVE Program
- CVE-2026-92987 · NVD
- FIRST EPSS
- GHSA-5fxw-8768-v85x · GitHub Advisory Database · CC BY 4.0
- CVE-2026-92987 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences