Bug 2518054 - CVE-2026-72815 opkssh: go-chi chi: IP spoofing via X-Forwarded-For header allows bypass of access controls [fedora-all]
Summary: CVE-2026-72815 opkssh: go-chi chi: IP spoofing via X-Forwarded-For header all...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: opkssh
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Till Hofmann
QA Contact:
URL:
Whiteboard: {"flaws": ["8fb97718-ab21-44cf-bd21-7...
Depends On:
Blocks: CVE-2026-72815
TreeView+ depends on / blocked
 
Reported: 2026-08-18 16:42 UTC by Joel Chamberlain
Modified: 2026-08-31 17:15 UTC (History)
2 users (show)

Fixed In Version: opkssh-0.16.0-2.fc43 opkssh-0.16.0-2.fc44
Clone Of:
Environment:
Last Closed: 2026-08-31 16:59:11 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Joel Chamberlain 2026-08-18 16:42:03 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 08:38:21 UTC
FEDORA-2026-f5a5073561 (opkssh-0.16.0-2.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5a5073561

Comment 2 Fedora Update System 2026-08-19 08:39:12 UTC
FEDORA-2026-8d9ba295e0 (opkssh-0.16.0-2.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-8d9ba295e0

Comment 3 Fedora Update System 2026-08-20 16:39:26 UTC
FEDORA-2026-f5a5073561 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-f5a5073561`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5a5073561

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 16:40:02 UTC
FEDORA-2026-8d9ba295e0 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-8d9ba295e0`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-8d9ba295e0

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 16:59:11 UTC
FEDORA-2026-8d9ba295e0 (opkssh-0.16.0-2.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-08-31 17:15:44 UTC
FEDORA-2026-f5a5073561 (opkssh-0.16.0-2.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.


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