CVE-2026-123515 json
Vikunja before 2.7.1 Client-Side Request Forgery via Stored Rich-Text Images
published 21d ago modified 4d ago also EUVD-2026-119400 , GHSA-2f75-93c9-xf32
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository go-vikunja/vikunja. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 4.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 6%
- public exploits
- 0
- none known
Summary
Vikunja before 2.7.1 contains a client-side request forgery vulnerability that allows users with write access to make viewers' clients request loopback or LAN addresses by storing img elements in rich text. Attackers can plant images in tasks, comments, project descriptions, or imported Markdown to trigger blind GET requests against local services and track when viewers open content.
Patch / fix
- go-vikunja vikunja 2.7.1
Is CVE-2026-123515 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N |
| CNA | 3.1 | 4.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N |
| CNA | 4.0 | 5.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 4.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N |
Affected products
- go-vikunja vikunja
Classification
- Weakness
-
- CWE-441 Unintended Proxy or Intermediary
References
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-2f75-93c9-xf32
vendor-advisory, advisory
-
vulncheck.com
/advisories/vikunja-before-2.7.1-client-side-request-forgery-via-stored-rich-text-images
third-party-advisory
Sources
- CVE List CVE-2026-123515
- NVD CVE-2026-123515
- Maintainer advisory GHSA-2f75-93c9-xf32
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of go-vikunja/vikunja published their own advisory on GitHub. Reviewed sources take precedence over it.