# CVE-2026-123515: Vikunja before 2.7.1 Client-Side Request Forgery via Stored Rich-Text Images

Status: published. Published: 2026-11-08. Updated: 2026-11-12.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- go-vikunja / vikunja (code.vikunja.io/api): ≥ 0; < 2.7.1 (affected, semver); 2.7.1 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 5.1 (medium); 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; source: CNA: VulnCheck

- CVSS 3.1: 4.1 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 5.1 (medium); 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; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 4.1 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.17% as of 2026-11-12; percentile 6.47%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-441

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-2f75-93c9-xf32 (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/vikunja-before-2.7.1-client-side-request-forgery-via-stored-rich-text-images (CNA: VulnCheck; third-party-advisory)

- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-2f75-93c9-xf32 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/vikunja-before-2.7.1-client-side-request-forgery-via-stored-rich-text-images (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-123515; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123515; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-123515; retrieved 2026-11-12; source updated Not reported

Revision: fcd0b7be365e7c535e26a1c0f9449fa02f0e6955e9aa4689fe46afe9a9eaf7c6

Canonical: https://y2.dev/cve/CVE-2026-123515

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.