# CVE-2026-121841: Other issue in Firefox for iOS

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

Other issue in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Mozilla / Firefox for iOS: ≥ 160.0; ≤ * (unaffected, rpm). Source: CNA: mozilla

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: Not reported

## Exploit evidence

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=2081874 (CNA: mozilla)

- https://www.mozilla.org/security/advisories/mfsa2026-124/ (CNA: mozilla)

## Provenance

- CNA: mozilla: https://www.cve.org/CVERecord?id=CVE-2026-121841; retrieved 2026-11-09; source updated 2026-11-09

Revision: 8cc3797e0f967e8bb9c8b75253b179c31715de69a6c73fdc49e64a73ba28984f

Canonical: https://y2.dev/cve/CVE-2026-121841

## 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.