2.9

CVE-2026-24515: libexpat_project libexpat NULL Pointer Dereference

CVSS: 2.9v3.1LowModified
AliasesALPINE-CVE-2026-24515UBUNTU-CVE-2026-24515DEBIAN-CVE-2026-24515
Published 23-01-2026Last modified 02-06-2026
Open JSON

Vulnerability summary

CVE-2026-24515 is a low (CVSS 2.9) NULL Pointer Dereference vulnerability in libexpat_project libexpat. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.7% of scored vulnerabilities.

Overall risk
12/100
0100
Low · default modelHow is this calculated?
CVSS score
2.9/10
010
Low · v3.1 (CVE.org)
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 15 · Related 17
MGASA-2026-0031OPENSUSE-SU-2026:10144-1OPENSUSE-SU-2026:20306-1SUSE-SU-2026:0386-1SUSE-SU-2026:0646-1SUSE-SU-2026:0647-1

Timeline

  1. 23-01-2026
    PublishedVulnerability first disclosed.
  2. 02-06-2026
    Last modifiedVulnerability information updated.

Description

In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected 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+esm11 | < 2.1.0-7ubuntu0.16.04.5+esm11 | < 2.2.5-3ubuntu0.9+esm3 | < 2.2.9-1ubuntu0.8+esm1 | < 2.4.7-1ubuntu0.7 | < 2.6.1-2ubuntu0.4 | < 2.7.1-2ubuntu0.2
Alpine1 product
  • expat< 2.7.4-r0
Chainguard1 product
  • expat< 2.7.4-r0
Debian1 product
  • expat< 2.5.0-1+deb12u4 | < 2.8.2-1~deb13u1 | < 2.7.3-2
Libexpat_project1 product
Wolfi1 product
  • expat< 2.7.4-r0

6 vendors · 21 products

References

11 links
Show all 11 references