4.2

CVE-2026-1484: glib2.0 Out-of-bounds Write

CVSS: 4.2v3.1MediumDeferred
AliasesUBUNTU-CVE-2026-1484DEBIAN-CVE-2026-1484
Published 27-01-2026Last modified 02-06-2026
Open JSON

Vulnerability summary

CVE-2026-1484 is a medium (CVSS 4.2) Out-of-bounds Write vulnerability in glib2.0. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 26.7% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.2/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.35%
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 the GLib Base64 encoding routine when processing very large input data. Due to incorrect use of integer types during length calculation, the library may miscalculate buffer boundaries. This can cause memory writes outside the allocated buffer. Applications that process untrusted or extremely large Base64 input using GLib may crash or behave unpredictably.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.03 pp

From 0.32% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.35%

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