Bug 2550235

Summary:	CVE-2026-103902 libdigidocpp: libdigidocpp: Digital signature forgery via improper signature verification [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Vladimir Vasilev <vvasilev>
Component:	libdigidocpp	Assignee:	Germano Massullo (Thetra) <germano.massullo>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	cserpentis, germano.massullo
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["c097e247-55fa-42bb-8ca1-a0b7d0dcdc3a"]}
Fixed In Version:	libdigidocpp-4.5.1-1.fc44 libdigidocpp-4.5.1-1.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-21 16:44:02 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:	2549509

Description Vladimir Vasilev 2026-10-13 07:33:53 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.

Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures
 that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.

Comment 1 Fedora Update System 2026-10-13 13:28:18 UTC

FEDORA-2026-55f12cda09 (libdigidocpp-4.5.1-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-55f12cda09

Comment 2 Fedora Update System 2026-10-13 13:28:18 UTC

FEDORA-2026-f1ce644e04 (libdigidocpp-4.5.1-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f1ce644e04

Comment 3 Fedora Update System 2026-10-13 13:28:18 UTC

FEDORA-2026-880f2eea6e (libdigidocpp-4.5.1-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-880f2eea6e

Comment 4 Fedora Update System 2026-10-14 02:18:03 UTC

FEDORA-2026-880f2eea6e 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-2026-880f2eea6e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-880f2eea6e

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

Comment 5 Fedora Update System 2026-10-14 02:45:33 UTC

FEDORA-2026-f1ce644e04 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-f1ce644e04`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f1ce644e04

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

Comment 6 Fedora Update System 2026-10-14 02:57:51 UTC

FEDORA-2026-55f12cda09 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-2026-55f12cda09`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-55f12cda09

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

Comment 7 Fedora Update System 2026-10-21 16:44:02 UTC

FEDORA-2026-55f12cda09 (libdigidocpp-4.5.1-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-10-22 01:48:37 UTC

FEDORA-2026-f1ce644e04 (libdigidocpp-4.5.1-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.