CVE-2026-41080 | libexpat up to 2.7.5 XML Document entropy (ID 47 / EUVD-2026-23276)

VDB-357961 · CVE-2026-41080 · ID 47 LIBEXPAT UP TO 2.7.5 XML DOCUMENT ENTROPY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 2.6 $0-$5k 2.83 Summaryinfo A vulnerability identified as problematic has been detected in libexpat up to 2.7.5. Affected is an unknown function of the component XML Document Handler. This manipulation causes entropy. This vulnerability is handled as CVE-2026-41080. It is possible to launch the attack on the local host. There is not any exploit available. You should upgrade the affected component. Detailsinfo A vulnerability has been found in libexpat up to 2.7.5 and classified as problematic. Affected by this vulnerability is some unknown functionality of the component XML Document Handler. The manipulation with an unknown input leads to a entropy vulnerability. The CWE definition for the vulnerability is CWE-331. The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. As an impact it is known to affect confidentiality. The summary by CVE is: libexpat before 2.7.6 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document. The advisory is shared at github.com. This vulnerability is known as CVE-2026-41080 since 04/16/2026. The exploitation appears to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue. Upgrading to version 2.7.6 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-23276). Productinfo Name libexpat Version 2.7.0 2.7.1 2.7.2 2.7.3 2.7.4 2.7.5 Website Product: https://github.com/libexpat/libexpat/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 2.7 VulDB Meta Temp Score: 2.6 VulDB Base Score: 2.5 VulDB Temp Score: 2.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 2.9 CNA Vector (MITRE): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Entropy CWE: CWE-331 / CWE-330 / CWE-310 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: libexpat 2.7.6 Patch: github.com Timelineinfo 04/16/2026 Advisory disclosed 04/16/2026 +0 days CVE reserved 04/16/2026 +0 days VulDB entry created 04/16/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: 47 Status: Confirmed CVE: CVE-2026-41080 (🔒) GCVE (CVE): GCVE-0-2026-41080 GCVE (VulDB): GCVE-100-357961 EUVD: 🔒 Entryinfo Created: 04/16/2026 21:42 Updated: 04/16/2026 21:54 Changes: 04/16/2026 21:42 (65), 04/16/2026 21:54 (1) Complete: 🔍 Cache ID: 99:FB9:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸