5.5

CVE-2023-52426: libexpat_project libexpat

Modified
AliasesALPINE-CVE-2023-52426UBUNTU-CVE-2023-52426DEBIAN-CVE-2023-52426
Published 04-02-2024Last modified 15-10-2026

Vulnerability summary

CVE-2023-52426 is a medium (CVSS 5.5) vulnerability in libexpat_project libexpat. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 33.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2024:13695-1SUSE-SU-2025:20207-1SUSE-SU-2025:20311-1

Timeline

  1. 04-02-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.37% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu12 products
  • ayttmAll versions (No fix recorded)
  • cableswigAll versions (No fix recorded)
  • cadaverAll versions (No fix recorded)
  • coin3All versions (No fix recorded)
  • expat< 2.6.0-1
Debian2 products
  • expatAll versions (No fix recorded) | < 2.6.0-1
  • libxmltokAll versions (No fix recorded)
Alpine1 product
  • expat< 2.6.0-r0
Libexpat_project1 product

4 vendors · 16 products

References

14 links
Show all 14 references