Vulnerability record/PUBLISHED/Published Jan 27, 2026 13:41:54 UTC

CVE-2026-1484

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.

Base score4.2/ 10

SeverityMediumCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorNetworkAV

Attack complexityHighAC

Privileges requiredNonePR

User interactionRequiredUI

ScopeUnchangedS

Confidentiality impactNoneC

Integrity impactLowI

Availability impactLowA

CVSS vector stringCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authorityredhat

Last updatedNov 6, 2026 07:51:41 UTC

PublishedJan 27, 2026 13:41:54 UTC

ReservedJan 27, 2026 11:58:49 UTC

Credits

Red Hat would like to thank treeplus for reporting this issue.