Bug 2489780 - CVE-2026-44839 rabbitmq-server: RabbitMQ: Unsanitized vhost names allow for XSS in management UI [fedora-all]
Summary: CVE-2026-44839 rabbitmq-server: RabbitMQ: Unsanitized vhost names allow for X...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: rabbitmq-server
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Peter Lemenkov
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["648b48e3-ddc5-4780-aaa0-6...
Depends On:
Blocks: CVE-2026-44839
TreeView+ depends on / blocked
 
Reported: 2026-06-17 08:05 UTC by Ganesh
Modified: 2026-08-08 01:27 UTC (History)
2 users (show)

Fixed In Version: rabbitmq-server-4.2.9-2.fc44 rabbitmq-server-4.0.9-5.fc43
Clone Of:
Environment:
Last Closed: 2026-08-01 00:53:09 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Ganesh 2026-06-17 08:05:51 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.

Comment 1 Fedora Update System 2026-07-23 00:01:53 UTC
FEDORA-2026-ff2a96c8de (rabbitmq-server-4.2.9-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ff2a96c8de

Comment 2 Peter Lemenkov 2026-07-23 00:16:47 UTC
Upstream advisory metadata for CVE-2026-44839 (GHSA-fh5r-jpm3-fjwp) is inaccurate. Corrected analysis and the Fedora fix follow.

Referenced patch is wrong. The advisory/NVD cite commit 7f54319279d1ece161ae0b4cdc6f0e58a4045eb5 as the patch. That commit is from 2017 ("API to restart a crashed vhost") and introduces the vhost-restart mechanism that is the attack precondition -- it is not a fix. It is present in every 4.0.x and 4.1.x release, including 4.0.9 and the advisory's claimed-fixed 4.1.2, so it cannot be the patch.

Fixed-version fields are wrong.
- "4.0.13" was never released; the 4.0.x line ends at 4.0.9.
- 4.1.2 does not contain the fix, and neither does any 4.1.x release through 4.1.4.

Actual fix: commit cfce31ef0510f5c3479415b95b4cb118ecc71f7d ("management: Sanitize vhost names in restart forms", 2025-06-17), first released upstream in 4.2.0. Correct boundary: affected < 4.2.0, fixed in 4.2.0.

Fedora status:
- f44 and rawhide ship >= 4.2.0 (4.2.x / 4.3.x) and already contain the fix.
- f43 ships 4.0.9; as no 4.0.x or 4.1.x release carries the fix, cfce31e has been backported onto 4.0.9. Updated F43 build in progress.

Comment 3 Fedora Update System 2026-07-23 01:40:39 UTC
FEDORA-2026-ff2a96c8de 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-ff2a96c8de`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-ff2a96c8de

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

Comment 4 Fedora Update System 2026-07-23 07:16:28 UTC
FEDORA-2026-b29cbdb53f (rabbitmq-server-4.0.9-4.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-b29cbdb53f

Comment 5 Fedora Update System 2026-07-24 01:28:51 UTC
FEDORA-2026-6326bdeab0 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-2026-6326bdeab0`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6326bdeab0

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

Comment 6 Fedora Update System 2026-07-24 01:51:38 UTC
FEDORA-2026-b29cbdb53f 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-b29cbdb53f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-b29cbdb53f

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

Comment 7 Fedora Update System 2026-07-31 01:44:29 UTC
FEDORA-2026-548235ea3b 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-2026-548235ea3b`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-548235ea3b

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

Comment 8 Fedora Update System 2026-08-01 00:53:09 UTC
FEDORA-2026-6326bdeab0 (rabbitmq-server-4.2.9-2.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-08-08 01:27:15 UTC
FEDORA-2026-548235ea3b (rabbitmq-server-4.0.9-5.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


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