CVE-2026-12547CWE-201

Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch

Low · published July 21, 2026

CVSS v3.1
3.4
EPSS
0%
Percentile
12.8
In the wild
Unconfirmed
What it is

SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.

The record
Technical detail
CVSS v3.1
3.4 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00228 · 12.8th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2026-07-21T18:35Z
EPSS history
Timeline
  • 21 JUL 18:35Z
    Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch
    cvelistv5