UBUNTU-CVE-2026-12548: Medium severity ubuntu/libsoup2.4 vulnerability
Published Jul 21, 2026
·Updated
A heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mismatch between the caller and soupheadersparse() can cause the length parameter to be incorrectly truncated, leading to a heap buffer over-read. A remote attacker could use this flaw to crash an application using libsoup or potentially disclose heap memory contents.
Affected Software
11 affected components
ubuntu/libsoup2.4*
ubuntu/libsoup2.4*
ubuntu/libsoup2.4*
ubuntu/libsoup2.4*
ubuntu/libsoup3*
ubuntu/libsoup2.4*
ubuntu/libsoup3*
ubuntu/libsoup2.4*
ubuntu/libsoup3*
ubuntu/libsoup3*
ubuntu/libsoup2.4*
Event History
Jul 21, 2026
CVE Published
via OSV·07:17 PM
Data Sourced
via OSV·07:17 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
Does an attacker need credentials to exploit this issue?
No. The CVSS vector indicates no privileges are required, but it also indicates user interaction is required.
2
What conditions must be present for exploitation?
The affected application must use libsoup to parse multipart HTTP messages and process attacker-controlled input that reaches the vulnerable parsing path. Exploitation has high attack complexity according to the CVSS vector.