What is CVE-2026-12547?

CVE-2026-12547 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 3.4/10. Published 2026-07-21.

How severe is CVE-2026-12547?

Low severity. CVSS v3 base score is 3.4 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-12547

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…

CVSS v3 metric

CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N.

Affected products

Red Hat Enterprise Linux 10

Weakness classification (CWE)

CWE-201 — Insertion of Sensitive Information into Sent Data

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
secalert@redhat.com

Frequently asked questions

What is CVE-2026-12547?: CVE-2026-12547 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 3.4/10. Published 2026-07-21.
How severe is CVE-2026-12547?: Low severity. CVSS v3 base score is 3.4 out of 10.