CVE-2026-102555 — Libsoup: libsoup: heap buffer overflow via uninitialized length in data-uri base64 decoding
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(…
Published: 2026-09-29 · CVSS: 8.2 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7