CVE-2026-86141: xmlsoft libxml2 Unchecked Return Value
CVSS: 3.3v3.1LowAnalyzed
AliasesUBUNTU-CVE-2026-86141DEBIAN-CVE-2026-86141
Published 05-09-2026Last modified 09-09-2026
Vulnerability summary
CVE-2026-86141 is a low (CVSS 3.3) Unchecked Return Value vulnerability in xmlsoft libxml2. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.4% of scored vulnerabilities.
CVSS score
3.3/10
010
Low · v3.1 (NVD)EPSS score
0.17%
0%100%
Low · +0.05 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2Timeline
- 05-09-2026PublishedVulnerability first disclosed.
- 09-09-2026Last modifiedVulnerability information updated.
Description
xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate a string length after NULL checking.
CVSS metrics
4 scores · 4 sources · 1 versionLow 3.3Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LSources4 sources · 2.9–3.3
- CVE.orgCNA2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated3.3LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated3.3LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
+0.05 pp
From 0.12% on 20-09-2026
20-09-202620-10-2026
EPSS score0.17%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- libxml2All versions (No fix recorded) | < 2.15.4+dfsg-1
Ubuntu1 product
- libxml2All versions (No fix recorded)
Xmlsoft1 product
- libxml2< 2.15.4
3 vendors · 3 products
References
6 links- github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4Release Notes
