CVE-2026-102555
High
Description
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.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Gnome Libsoup
PublishedSep 29, 2026
First seenSep 29, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- gnome libsoup3.7.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnome libsoup | v < 3.7.3 | 3.7.3 |
| redhat enterprise_linux | 9.0, 10.0 | — |
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