CVE-2026-41080

LOWNVD 2.92.9—

2.9

libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

CVSS v3: 2.9
EG Score: 2.9(medium)
EPSS: 2.2%
KEV: Not listed

Published

April 16, 2026

Last Modified

April 27, 2026

References (5)

cve@mitrehttps://blog.hartwork.org/posts/expat-2-8-0-released/
cve@mitrehttps://github.com/libexpat/libexpat/issues/47
cve@mitrehttps://github.com/libexpat/libexpat/pull/1183
cve@mitrehttps://www.openwall.com/lists/oss-security/2026/04/26/1
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/04/26/1

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	expat-main-2.8.0-0.1.hum1	2026-04-27	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-331Insufficient Entropy

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Red HatRHSA-2026:11004LOW2026-04-16
RHSA-2026:11004 — Low

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 16:59 UTCEG score recompute
2026-05-20 16:59 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-41080?

CVE-2026-41080 is a low vulnerability published on April 16, 2026. libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

When was CVE-2026-41080 disclosed?

CVE-2026-41080 was first published in the National Vulnerability Database on April 16, 2026, with the most recent update on April 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-41080 actively exploited?

CVE-2026-41080 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-41080?

CVE-2026-41080 has a CVSS v3 base score of 2.9 (NVD).

How do I remediate CVE-2026-41080?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41080, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-41080

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