Bug 2518037

Summary:	CVE-2026-72815 opkssh: go-chi chi: IP spoofing via X-Forwarded-For header allows bypass of access controls [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Joel Chamberlain <jochambe>
Component:	opkssh	Assignee:	Till Hofmann <thofmann>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel10	CC:	go-sig, thofmann
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["8fb97718-ab21-44cf-bd21-747a7cb3a70d"]}
Fixed In Version:	opkssh-0.16.0-2.el10_3 opkssh-0.16.0-2.el10_2	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-31 16:24:01 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2515988

Description Joel Chamberlain 2026-08-18 16:39:35 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log entries, by supplying a spoofed IP address in the X-Forwarded-For header. The issue is fixed in version 5.3.0.

Comment 1 Fedora Update System 2026-08-19 08:39:32 UTC

FEDORA-EPEL-2026-8d8aa891da (opkssh-0.16.0-2.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-8d8aa891da

Comment 2 Fedora Update System 2026-08-19 08:41:37 UTC

FEDORA-EPEL-2026-f45034028f (opkssh-0.16.0-2.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-f45034028f

Comment 3 Fedora Update System 2026-08-20 15:29:23 UTC

FEDORA-EPEL-2026-8d8aa891da has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-8d8aa891da

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-08-20 15:58:22 UTC

FEDORA-EPEL-2026-f45034028f has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-f45034028f

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-08-31 16:24:01 UTC

FEDORA-EPEL-2026-f45034028f (opkssh-0.16.0-2.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-08-31 16:38:51 UTC

FEDORA-EPEL-2026-8d8aa891da (opkssh-0.16.0-2.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.