# CVE-2026-54142: OpenHuman: Indirect prompt injection via background email sync executes Composio actions without user approval

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

OpenHuman is an open-source agent harness available as a desktop application and Rust library. Before 0.57.13, background synchronization for connected services such as email, Slack, and Notion stores raw external content and later places it in the model context of autonomous background agents without neutralizing embedded instructions. ApprovalGate treats tool calls without an interactive chat context as pre-authorized automation, so attacker-authored content processed during a background tick can influence the model to invoke Composio actions without presenting an approval request. An attacker who can deliver content to a connected account can use this path to send or forward data, post messages, create or modify third-party content, or disclose information from OpenHuman memory and integrations. The issue requires an active integration and successful model interpretation of the injected instructions. This issue is fixed in version 0.57.13.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- tinyhumansai / openhuman: < 0.57.13 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.7 (high); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-1427

## Exploit evidence

- exploit: https://github.com/tinyhumansai/openhuman/security/advisories/GHSA-p9gw-q7cf-57qr (ADP: CISA-ADP)

## References

- https://github.com/tinyhumansai/openhuman/security/advisories/GHSA-p9gw-q7cf-57qr (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/tinyhumansai/openhuman/pull/3227 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/tinyhumansai/openhuman/commit/3a7180da7765af861bf44d79e025fc67dbeae0ca (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/tinyhumansai/openhuman/releases/tag/v0.57.13 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/tinyhumansai/openhuman/security/advisories/GHSA-p9gw-q7cf-57qr (ADP: CISA-ADP; exploit)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-54142; retrieved 2026-11-05; source updated 2026-11-05

Revision: e19191b4083f4158085a45616ae20ddb0610aaa772a9946db11ec6524e1e1020

Canonical: https://y2.dev/cve/CVE-2026-54142

## Agent and API access

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- 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.

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