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TI-2026-71903 Aliases CVE-2026-52394GHSA-crch-2448-h674

Incorrect access control in DeepSeek V4 via crafted input

Priority HIGH 80CWE-201Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-201.

Summary

DeepSeek V4 has an incorrect access control flaw that a crafted input can trigger over the network, without privileges or user interaction. The weakness is mapped to CWE-201 (Insertion of Sensitive Information Into Sent Data) and CWE-209 (Generation of Error Message Containing Sensitive Information). CVSS 3.1 scores it 9.1 (CRITICAL), with high confidentiality and integrity impact and no availability impact. CISA SSVC rates exploitation as proof of concept, automatable, with total technical impact, and the flaw is not listed in KEV.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

DeepSeek V4 is vulnerable to Incorrect Access Control via a crafted input.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00397 34th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for DeepSeek V4.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-52394
  2. 2026-10-13 Alias added: GHSA-crch-2448-h674

References

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences