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.

• CWE-125

• https://access.redhat.com/errata/RHSA-2026:83618
• https://access.redhat.com/errata/RHSA-2026:93583
• https://access.redhat.com/errata/RHSA-2026:98560
• https://access.redhat.com/security/cve/CVE-2026-102555Mitigation, Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2543224Issue Tracking, Vendor Advisory

Published

Sep 29, 2026

Last Modified

Nov 11, 2026

Status

Modified

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