# CVE-2026-122670: WordPress Polylang plugin <= 3.9 - Broken Access Control vulnerability

Status: published. Published: 2026-11-06. Updated: 2026-11-06.

Missing Authorization vulnerability in WP SYNTEX Polylang polylang allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Polylang: from n/a through 3.9.

## Remediation

- fix: Update the WordPress Polylang plugin to the latest available version (at least 3.9.1). (source: CNA: Patchstack)

## Affected products and versions

- WP SYNTEX / Polylang (polylang): ≥ 0; ≤ 3.9 (affected, custom); unaffected at 3.9.1. Source: CNA: Patchstack

## Severity and prioritization

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N; source: CNA: Patchstack

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N; source: NVD: audit@patchstack.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-862

## Exploit evidence

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

## References

- https://patchstack.com/database/wordpress/plugin/polylang/vulnerability/wordpress-polylang-plugin-3-9-broken-access-control-vulnerability?_s_id=cve (CNA: Patchstack; vdb-entry)

- https://patchstack.com/database/wordpress/plugin/polylang/vulnerability/wordpress-polylang-plugin-3-9-broken-access-control-vulnerability?_s_id=cve (audit@patchstack.com)

## Provenance

- CNA: Patchstack: https://www.cve.org/CVERecord?id=CVE-2026-122670; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-122670; retrieved 2026-11-07; source updated 2026-11-06

Revision: 4b5d915bf73873ec2972e7b690803030cefb9a793ec167bd6145f05c112a2407

Canonical: https://y2.dev/cve/CVE-2026-122670

## 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.