# CVE-2026-123653: esengine DeepSeek-Reasonix doc.go discoverDocs llm prompting input

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

A security vulnerability has been detected in esengine DeepSeek-Reasonix up to 2.52.0. Affected is the function discoverDocs of the file internal/memory/doc.go. The manipulation leads to improper neutralization of input used for llm prompting. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 2.53.0 is able to address this issue. The identifier of the patch is 4ca33493a673c2788aa8598fbca2b2f47a69e1b8. It is suggested to upgrade the affected component.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/esengine/DeepSeek-Reasonix/commit/4ca33493a673c2788aa8598fbca2b2f47a69e1b8
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/esengine/DeepSeek-Reasonix/releases/tag/v2.53.0

## Affected products and versions

- esengine / DeepSeek-Reasonix: 2.0 (affected); 2.1 (affected); 2.2 (affected); 2.3 (affected); 2.4 (affected); 2.5 (affected); 2.6 (affected); 2.7 (affected); 2.8 (affected); 2.9 (affected); 2.10 (affected); 2.11 (affected); 2.12 (affected); 2.13 (affected); 2.14 (affected); 2.15 (affected); 2.16 (affected); 2.17 (affected); 2.18 (affected); 2.19 (affected); 2.20 (affected); 2.21 (affected); 2.22 (affected); 2.23 (affected); 2.24 (affected); 2.25 (affected); 2.26 (affected); 2.27 (affected); 2.28 (affected); 2.29 (affected); 2.30 (affected); 2.31 (affected); 2.32 (affected); 2.33 (affected); 2.34 (affected); 2.35 (affected); 2.36 (affected); 2.37 (affected); 2.38 (affected); 2.39 (affected); 2.40 (affected); 2.41 (affected); 2.42 (affected); 2.43 (affected); 2.44 (affected); 2.45 (affected); 2.46 (affected); 2.47 (affected); 2.48 (affected); 2.49 (affected); 2.50 (affected); 2.51 (affected); 2.52.0 (affected); 2.53.0 (unaffected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 6.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 6.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 7.5 (high); AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-1427, CWE-349

## Exploit evidence

- exploit: https://github.com/ybyu-ieu/agent-security-advisories/blob/main/deepseek-reasonix/deepseek-reasonix-agents-md-prompt-injection-command-execution.md (CNA: VulDB)

## References

- https://vuldb.com/vuln/431772 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/431772/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-123653 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1033134 (CNA: VulDB; third-party-advisory)

- https://github.com/esengine/DeepSeek-Reasonix/issues/13061 (CNA: VulDB; issue-tracking)

- https://github.com/esengine/DeepSeek-Reasonix/security/advisories/GHSA-7v48-x992-r5w7 (CNA: VulDB; related)

- https://github.com/ybyu-ieu/agent-security-advisories/blob/main/deepseek-reasonix/deepseek-reasonix-agents-md-prompt-injection-command-execution.md (CNA: VulDB; exploit)

- https://github.com/esengine/DeepSeek-Reasonix/commit/4ca33493a673c2788aa8598fbca2b2f47a69e1b8 (CNA: VulDB; patch)

- https://github.com/esengine/DeepSeek-Reasonix/releases/tag/v2.53.0 (CNA: VulDB; patch)

- https://github.com/esengine/DeepSeek-Reasonix/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-123653; retrieved 2026-11-06; source updated 2026-11-06

Revision: f8e7f6cfa7abd533b33625eb56690bc0ff259f39d2855ff7ff074ae186b9e4a8

Canonical: https://y2.dev/cve/CVE-2026-123653

## 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.