libsoup: libsoup: Heap buffer overflow via uninitialized length in data-URI base64 decoding

A flaw was found in libsoup. The soupuridecodedatauri function incorrectly treated base64 data-URI payloads as NUL-terminated strings when calling gbase64decodeinplace. If the percent-decoded payload contained embedded NUL bytes, the decoded length could remain uninitialized and be used as the si...