5.4

CVE-2026-1489: glib2.0 Out-of-bounds Write

CVSS: 5.4v3.1MediumDeferred
AliasesUBUNTU-CVE-2026-1489DEBIAN-CVE-2026-1489
Published 27-01-2026Last modified 02-06-2026
Open JSON

Vulnerability summary

CVE-2026-1489 is a medium (CVSS 5.4) Out-of-bounds Write vulnerability in glib2.0. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.6% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.37%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 10
DLA-4491-1OPENSUSE-SU-2026:10111-1OPENSUSE-SU-2026:20150-1SUSE-SU-2026:0355-1SUSE-SU-2026:0372-1SUSE-SU-2026:0373-1

Timeline

  1. 27-01-2026
    PublishedVulnerability first disclosed.
  2. 02-06-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in GLib. An integer overflow vulnerability in its Unicode case conversion implementation can lead to memory corruption. By processing specially crafted and extremely large Unicode strings, an attacker could trigger an undersized memory allocation, resulting in out-of-bounds writes. This could cause applications utilizing GLib for string conversion to crash or become unstable.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

+0.03 pp

From 0.34% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.37%

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

Debian1 product
  • glib2.0< 2.74.6-2+deb12u9 | < 2.84.4-3~deb13u3 | < 2.86.3-5
Ubuntu1 product
  • glib2.0All versions (No fix recorded) | < 2.72.4-0ubuntu2.9 | < 2.80.0-6ubuntu3.8 | < 2.86.0-2ubuntu0.3 | < 2.87.2-2

2 vendors · 2 products

References

9 links