CVE-2026-102555

A flaw was found in libsoup. The soup_uri_decode_data_uri() function incorrectly treated base64 data-URI payloads as NUL-terminated strings when calling g_base64_decode_inplace(). If the percent-decoded payload contained embedded NUL bytes, the decoded length could remain uninitialized and be used as the size of the returned GBytes. This can lead to an out-of-bounds read or application crash when processing a crafted data URI.

CVSS 3.1

8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2026-09-29

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• gnome:libsoup
• redhat:enterprise_linux

References

• https://access.redhat.com/errata/RHSA-2026:83618
• https://access.redhat.com/security/cve/CVE-2026-102555
• https://bugzilla.redhat.com/show_bug.cgi?id=2543224

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