CVE-2026-102555
Libsoup: libsoup: heap buffer overflow via uninitialized length in data-uri base64 decoding
- State
- Published
- Severity
- 8.2 High
- Published
- Sep 29, 2026
- Updated
- Nov 2, 2026
- Reserved
- Sep 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.2 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | redhat |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 10Red Hat |
|
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat |
|
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat |
References
- RHSA-2026:83618vendor-advisory
- RHSA-2026:93583vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-102555vdb-entry
- RHBZ#2543224issue-tracking
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