Vulnerability · CVE-2026-41080
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Published Apr 16, 2026 · catalog updated Jul 14, 2026 · libexpat project
Check if you run it
No confirmed exploitation is on record for CVE-2026-41080. EPSS is 0.40%. Act only if a listed version of libexpat project is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Low2.9
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.40%
- Remediation
- Advisory link
- Affected products
- cpe libexpat project/libexpat
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe libexpat project/libexpatversion unspecified
How to fix CVE-2026-41080
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-41080. EPSS is 0.40%. Act only if a listed version of libexpat project is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-331. EPSS 0.40%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Apr 16, 2026 · NIST NVD
Detected
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Jul 14, 2026 · NIST NVD
Updated
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Sources
- CVE.orgVulnerability recordCVE-2026-41080
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-41080
30-day exploitation probability 0.4%
first.org - NIST NVDVulnerability recordCVE-2026-41080
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.