Bug 2521817

Summary:	CVE-2026-13401 perl-XML-Bare: perl-XML-Bare: Denial of Service via malformed XML attributes [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Vladimir Vasilev <vvasilev>
Component:	perl-XML-Bare	Assignee:	Emmanuel Seyman <emmanuel>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	emmanuel, i, perl-devel
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["0e998650-39b7-4387-a4e7-c2c6dfc2446f"]}
Fixed In Version:	perl-XML-Bare-0.53-40.el9 perl-XML-Bare-0.53-44.fc43 perl-XML-Bare-0.53-45.fc44 perl-XML-Bare-0.53-47.fc45	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-09-08 00:45:05 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:	2501406

Description Vladimir Vasilev 2026-08-24 11:33:37 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.

XML::Bare versions through 0.53 for Perl will hang in an infinite loop when parsing malformed attributes.

The parserc_parse function never advances the attribute-parse state cursor on certain malformed attribute forms, looping forever.

Nameless attributes such as "<a ='c'>" or unbalanced quotes "<a b='''''''c'>" can trigger this condition.

Comment 1 Fedora Update System 2026-08-30 10:03:45 UTC

FEDORA-EPEL-2026-e2adb4a954 (perl-XML-Bare-0.53-40.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-e2adb4a954

Comment 2 Fedora Update System 2026-08-30 10:03:53 UTC

FEDORA-2026-14e358a2a2 (perl-XML-Bare-0.53-44.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-14e358a2a2

Comment 3 Fedora Update System 2026-08-30 10:04:01 UTC

FEDORA-2026-5c3f4c8337 (perl-XML-Bare-0.53-45.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-5c3f4c8337

Comment 4 Fedora Update System 2026-08-30 10:04:10 UTC

FEDORA-2026-3a2db4368a (perl-XML-Bare-0.53-47.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3a2db4368a

Comment 5 Fedora Update System 2026-08-31 17:51:54 UTC

FEDORA-2026-5c3f4c8337 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-2026-5c3f4c8337`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-5c3f4c8337

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

Comment 6 Fedora Update System 2026-08-31 18:12:24 UTC

FEDORA-2026-14e358a2a2 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-2026-14e358a2a2`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-14e358a2a2

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

Comment 7 Fedora Update System 2026-08-31 18:23:06 UTC

FEDORA-EPEL-2026-e2adb4a954 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-e2adb4a954

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

Comment 8 Fedora Update System 2026-08-31 18:27:30 UTC

FEDORA-2026-3a2db4368a has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-3a2db4368a`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3a2db4368a

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

Comment 9 Fedora Update System 2026-09-08 00:45:05 UTC

FEDORA-EPEL-2026-e2adb4a954 (perl-XML-Bare-0.53-40.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-09-08 00:56:43 UTC

FEDORA-2026-14e358a2a2 (perl-XML-Bare-0.53-44.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 11 Fedora Update System 2026-09-08 01:11:33 UTC

FEDORA-2026-5c3f4c8337 (perl-XML-Bare-0.53-45.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 12 Fedora Update System 2026-09-11 18:55:28 UTC

FEDORA-2026-3a2db4368a (perl-XML-Bare-0.53-47.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.