Bug 2490130 (CVE-2026-55202) - CVE-2026-55202 tinyproxy: Tinyproxy: Unauthorized access and request misrouting due to improper Host header validation
Summary: CVE-2026-55202 tinyproxy: Tinyproxy: Unauthorized access and request misrouti...
Keywords:
Status: NEW
Alias: CVE-2026-55202
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2491335 2491336
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-17 20:02 UTC by OSIDB Bzimport
Modified: 2026-06-22 13:10 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-06-17 20:02:06 UTC 
Tinyproxy through 1.11.3, fixed in commit 09312a1, fails to properly validate the Host header during stathost detection, allowing unauthenticated attackers to access the stats page by injecting a matching Host header or bypass detection via port manipulation. Remote attackers can trigger unauthorized access to internal proxy statistics or misroute requests as transparent proxy connections to circumvent access controls.
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