# CVE-2026-115938: Low privilege condition filter escapes Twig sandbox, recovers "securityKey" and reaches RCE

Status: published. Published: 2026-10-23. Updated: 2026-11-02.

Craft CMS allows any authenticated control panel user to submit an element-search condition whose element selector is evaluated as a sandboxed Twig object template. Craft’s allowed column filter delegates property lookup to Yii ArrayHelper, outside Twig’s SecurityPolicy. Repeated single-segment lookups therefore bypass the sandbox’s empty property/method allowlists.



The vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID 1 when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle.



After recovering GeneralConfig::securityKey, the same user can compute Craft’s generic HMAC wire format offline. Signed parameters such as redirect are then accepted and passed to unsandboxed View::renderObjectTemplate(), where Twig’s string-callable form can invoke native PHP callables. The regression proof uses the harmless substr() callback and observes abcdef becoming cdef; it does not execute an OS command.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- craftcms / cms (craftcms/cms): ≥ 5.0.0; < 5.11.2 (affected, semver); ≥ 4.0.0; < 4.18.9 (affected, semver). Source: CNA: Hackrate

## Severity and prioritization

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: Hackrate

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: Hackrate

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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: 7004884b-51e2-48e8-b4a2-5ca29e80453e

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: 7004884b-51e2-48e8-b4a2-5ca29e80453e

- CISA KEV: No listing in collected sources

- EPSS: 0.37% as of 2026-11-02; percentile 30.80%

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

- Weaknesses: CWE-1336

## Exploit evidence

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

## References

- https://www.hckrt.com/hacktivity/HCKRT-DRNL9W (CNA: Hackrate; third-party-advisory, technical-description, mitigation)

- https://github.com/craftcms/cms/releases/tag/5.11.2 (CNA: Hackrate; release-notes)

- https://github.com/craftcms/cms (CNA: Hackrate; product)

- https://github.com/craftcms/cms/security/advisories/GHSA-v4q3-2g5g-wjj6 (CNA: Hackrate; third-party-advisory)

- https://github.com/craftcms/cms (7004884b-51e2-48e8-b4a2-5ca29e80453e)

- https://github.com/craftcms/cms/releases/tag/5.11.2 (7004884b-51e2-48e8-b4a2-5ca29e80453e)

- https://github.com/craftcms/cms/security/advisories/GHSA-v4q3-2g5g-wjj6 (7004884b-51e2-48e8-b4a2-5ca29e80453e)

- https://www.hckrt.com/hacktivity/HCKRT-DRNL9W (7004884b-51e2-48e8-b4a2-5ca29e80453e)

## Provenance

- CNA: Hackrate: https://www.cve.org/CVERecord?id=CVE-2026-115938; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-115938; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-115938; retrieved 2026-11-02; source updated Not reported

Revision: bdbd8121c3b54896f8bcd23169f06e44f2590d495c1246df110483297bac3f09

Canonical: https://y2.dev/cve/CVE-2026-115938

## 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.