vikunja up to 2.1.x Header X-Forwarded-For reliance on untrusted inputs in a security decision

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in vikunja up to 2.1.x. Affected by this vulnerability is an unknown functionality of the component Header Handler. Such manipulation of the argument X-Forwarded-For leads to reliance on untrusted inputs in a security decision. This vulnerability is listed as CVE-2026-29794. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in vikunja up to 2.1.x. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Header Handler. The manipulation of the argument X-Forwarded-For with an unknown input leads to a reliance on untrusted inputs in a security decision vulnerability. Using CWE to declare the problem leads to CWE-807. The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism. Impacted is availability. CVE summarizes:

Vikunja is an open-source self-hosted task management platform. Starting in version 0.8 and prior to version 2.2.0, unauthenticated users are able to bypass the application's built-in rate-limits by spoofing the `X-Forwarded-For` or `X-Real-IP` headers due to the rate-limit relying on the value of `(echo.Context).RealIP`. Unauthenticated users can abuse endpoints available to them for different potential impacts. The immediate concern would be brute-forcing usernames or specific accounts' passwords. This bypass allows unlimited requests against unauthenticated endpoints. Version 2.2.0 patches the issue.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-29794 since 03/04/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 2.2.0 eliminates this vulnerability. The upgrade is hosted for download at vikunja.io.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-13706). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Reliance on untrusted inputs in a security decision
CWE: CWE-807 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: vikunja 2.2.0

Timelineinfo

03/04/2026 CVE reserved
03/20/2026 +16 days Advisory disclosed
03/20/2026 +0 days VulDB entry created
03/26/2026 +6 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-m547-hp4w-j6jx
Status: Confirmed

CVE: CVE-2026-29794 (🔒)
GCVE (CVE): GCVE-0-2026-29794
GCVE (VulDB): GCVE-100-352088
EUVD: 🔒

Entryinfo

Created: 03/20/2026 17:26
Updated: 03/26/2026 20:37
Changes: 03/20/2026 17:26 (65), 03/20/2026 17:39 (1), 03/26/2026 20:37 (1)
Complete: 🔍
Cache ID: 216:E33:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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