CVE-2026-41080: libexpat_project libexpat Insufficient Entropy
CVSS: 2.9v3.1LowModified
AliasesALPINE-CVE-2026-41080RHSA-2026:11004UBUNTU-CVE-2026-41080USN-8520-1DEBIAN-CVE-2026-41080CGA-f542-4m97-5v2vCGA-h7ph-x4mx-672f
Published 16-04-2026Last modified 15-10-2026
Vulnerability summary
CVE-2026-41080 is a low (CVSS 2.9) Insufficient Entropy vulnerability in libexpat_project libexpat. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.5% of scored vulnerabilities.
CVSS score
2.9/10
010
Low · v3.1 (CVE.org)EPSS score
0.40%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 9Timeline
- 16-04-2026PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
CVSS metrics
8 scores · 8 sources · 1 versionLow 2.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LSources8 sources · 2.9–7.5
- OSV · AlpineEcosystem advisory · calculated2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · Red hatEcosystem advisory · calculated3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NDiffers
- OSV · DebianEcosystem advisory · calculated2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · WolfiEcosystem advisory · calculated2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · ChainguardEcosystem advisory · calculated2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVDNIST2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
33%
Versus all other CVEs
30-day change
0.00 pp
From 0.40% on 19-09-2026
19-09-202619-10-2026
EPSS score0.40%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu16 products
- ayttmAll versions (No fix recorded)
- cableswigAll versions (No fix recorded)
- cadaverAll versions (No fix recorded)
- coin3All versions (No fix recorded)
- expat< 2.1.0-4ubuntu1.4+esm12 | < 2.1.0-7ubuntu0.16.04.5+esm12 | All versions (No fix recorded) | < 2.6.1-2ubuntu0.5 | < 2.7.4-1ubuntu0.1
Redhat3 products
- expat< 0:2.8.0-0.1.hum1
- expat-devel< 0:2.8.0-0.1.hum1
- expat-static< 0:2.8.0-0.1.hum1
Alpine1 product
- expat< 2.8.1-r0 | < 2.8.0-r0
Chainguard1 product
- expat< 2.8.0-r0
Debian1 product
- expatAll versions (No fix recorded) | < 2.8.2-1~deb13u1 | < 2.8.0-1
Libexpat_project1 product
- libexpat< 2.8.0
Wolfi1 product
- expat< 2.8.0-r0
7 vendors · 24 products
References
20 links- images.redhat.comARTICLE
