CVE-2026-72522

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 47/100
Published: 2026-08-10 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

Weakness Classification (1)

Bug Bounty Relevance

47 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.2 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.19%
Raw Score 0.001910
Percentile 8.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00191
2026-10-28
0.00191

Intelligence Sources

nvd ref →