CVE-2026-29794 | vikunja up to 2.1.x Header X-Forwarded-For reliance on untrusted inputs in a security decision (GHSA-m547-hp4w-j6jx / EUVD-2026-13706)

VDB-352088 · CVE-2026-29794 · GHSA-M547-HP4W-J6JX VIKUNJA UP TO 2.1.X HEADER X-FORWARDED-FOR RELIANCE ON UNTRUSTED INPUTS IN A SECURITY DECISION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 2.17+ 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). Productinfo Name vikunja Version 2.0 2.1 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock 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 03/20/2026 +0 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: 03/20/2026 17:39 Changes: 03/20/2026 17:26 (65), 03/20/2026 17:39 (1) Complete: 🔍 Cache ID: 99:B90:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸