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  4. CVE 2026 89040 tencent mass service engine in cluster msec path
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Back to active CVEs
Critical · CVSS 9.3CVE-2026-89040

Tencent Mass Service Engine in Cluster (MSEC) path traversalCVE-2026-89040

Answer in brief

CVE-2026-89040 records a Critical severity (CVSS 9.3) vulnerability in Tencent Mass Service Engine in Cluster (MSEC) path traversal. The current sources do not mark it as known exploited. The current feed maps Tencent/Mass Service Engine in Cluster (MSEC) (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 22, 2026Source checked Oct 30, 2026First seen by HOL Sep 15, 2026Material review Sep 22, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Tencent/Mass Service Engine in Cluster (MSEC) (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Tencent/Mass Service Engine in Cluster (MSEC)generic>=0 <**

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Tencent/Mass Service Engine in Cluster (MSEC).
  2. 2Review the reported fix. Update Tencent/Mass Service Engine in Cluster (MSEC) to * if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 15, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referenceraw.githubusercontent.com
  • Source referencecve.org
Upstream source description

Tencent Mass Service Engine in Cluster (MSEC) allows a remote, unauthenticated attacker to send a crafted POST request including ../ and gain root access on the target device. An attacker who uploads a webshell can execute arbitrary code as root.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • sevenz-rust2: unchecked 7z entry paths permit traversal and absolute-path file overwritesAlso CWE-22
  • SABnzbd: Orphan-job path traversal permits arbitrary file deletionAlso CWE-22

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Oct 30, 2026
References
3 linked sources
Open source record