CVE-2026-86139

Publication date 5 September 2026

Last updated 8 October 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.9 · Medium

Score breakdown

Description

In libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer overflow.

Status

Package Ubuntu Release Status
libxml2 26.04 LTS resolute
Fixed 2.15.2+dfsg-0.1ubuntu0.3
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libxml2

Severity score breakdown

CVSS version: CVSS v3.0

Base score 6.9 · Medium

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-8910-1
    • libxml2 vulnerabilities
    • 8 October 2026

Other references

Access our resources on patching vulnerabilities