deepseek-ai deepseek-harness Landlock Backend profiles.ts isolation

published 2026-09-28 41 d ago modified 2026-09-28 41 d ago also EUVD-2026-88334

cvss: 6.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits: 0; none known

A vulnerability has been found in deepseek-ai deepseek-harness up to 0.1.7-rc.2. Affected is an unknown function of the file packages/sandbox/sandbox-local/src/profiles.ts of the component Landlock Backend. Such manipulation leads to improper isolation or compartmentalization. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. It is advisable to implement a patch to correct this issue. The vendor was contacted early about this disclosure but did not respond in any way.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 41 d ago (2026-09-28)

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/Ruoyyy/My_vulnerable/blob/main/SECURITY-MOUNT-ESCAPE.en.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	4.8	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P
CNA	3.1	6.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C
CNA	3.0	6.3	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C
CNA	2.0	4.3	AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C
CNA	4.0	1.9	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/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
CNA	3.1	6.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
CNA	2.0	4.3	AV:L/AC:L/Au:S/C:P/I:P/A:P

Affected products

deepseek-ai deepseek-harness

Classification

Weakness

CWE-653 Improper Isolation or Compartmentalization

References

github.com /Ruoyyy/My_vulnerable/blob/main/SECURITY-MOUNT-ESCAPE.en.md
exploit
vuldb.com /vuln/410949
vdb-entry
vuldb.com /vuln/410949/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-101078
third-party-advisory
vuldb.com /submit/929381
third-party-advisory

Sources

CVE List CVE-2026-101078
NVD CVE-2026-101078

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary