# CVE-2026-61637: Icinga Web 2: Open redirect on login page, under certain circumstances

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

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Prior to versions 2.12.7 and 2.13.1, an attacker can craft a URL that, once visited by an authenticated user (or one that is able to authenticate), allows to manipulate the backend to redirect the user to any location. For this to succeed, the victim's locale in Icinga Web must be different from en_US. This issue has been patched in versions 2.12.7 and 2.13.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Icinga / icingaweb2: < 2.12.7 (affected); < 2.13.1 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 3.5 (low); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-601

## Exploit evidence

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

## References

- https://github.com/Icinga/icingaweb2/security/advisories/GHSA-w7c2-xjv9-q8fv (CNA: GitHub_M; x_refsource_CONFIRM)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-61637; retrieved 2026-11-11; source updated 2026-11-11

Revision: 4e5069e6b21063f73b5da9cdd92846b9dbde7a0f8a88dac2252d6e700f4b13d2

Canonical: https://y2.dev/cve/CVE-2026-61637

## 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.