CVE-2026-54770

WebOb: Open redirect in Location header normalization via leading C0 control / space characters

CVE-2026-54770 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-54770, released August 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

6.1

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0042

36th percentile

an unauthenticated attacker who can influence an application's redirect target can send users to an

Where it's fixed

Product	Fixed in	Fix	Released
Linux
python-WebOb · sles 15.7	1.7.4-150000.3.9.1	SUSE-SU-2026:4765-1	Nov 7, 2026
python-webob · Debian 14	1:1.8.11-1	DEBIAN-CVE-2026-54770	Aug 20, 2026

Details

Published
August 20, 2026
Weakness
URL Redirection to Untrusted Site ('Open Redirect')
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54770

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