Bug 2491782

Summary:	CVE-2026-55766 roundcubemail: guzzlehttp/psr7: Information disclosure due to improper handling of CR/LF characters in HTTP start-line fields [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Keith Grant <kgrant>
Component:	roundcubemail	Assignee:	Remi Collet <fedora>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	45	CC:	anon.amish, fedora, kevin, mhlavink, tm
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["e751db4e-0348-40ce-a6ac-a942c87676f5"]}
Fixed In Version:	roundcubemail-1.7.3-1.fc44 roundcubemail-1.6.18-1.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-20 15:31:41 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:	2491769

Description Keith Grant 2026-06-23 16:15:13 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 2026-08-11 04:03:00 UTC

FEDORA-2026-2aa96a9ce5 (roundcubemail-1.7.3-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2aa96a9ce5

Comment 2 Fedora Update System 2026-08-11 04:18:04 UTC

FEDORA-2026-914a40b4fd (roundcubemail-1.6.18-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-914a40b4fd

Comment 3 Fedora Update System 2026-08-12 01:42:35 UTC

FEDORA-2026-2aa96a9ce5 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-2026-2aa96a9ce5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2aa96a9ce5

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

Comment 4 Fedora Update System 2026-08-12 02:02:59 UTC

FEDORA-2026-914a40b4fd 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-2026-914a40b4fd`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-914a40b4fd

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

Comment 5 Aoife Moloney 2026-08-17 14:57:44 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 6 Fedora Update System 2026-08-20 15:31:41 UTC

FEDORA-2026-2aa96a9ce5 (roundcubemail-1.7.3-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 7 Fedora Update System 2026-08-20 15:52:13 UTC

FEDORA-2026-914a40b4fd (roundcubemail-1.6.18-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.