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Fencer Vulns
high 7.8

CVE-2026-70338 json

Microsoft PowerShell Security Feature Bypass Vulnerability

published 2026-08-11 2 mo ago modified 2026-10-30 9 d ago also BIT-powershell-2026-70338 , EUVD-2026-56767

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

Patch / fix

  • bitnami powershell 7.4.19, 7.5.10, 7.6.5
  • Microsoft PowerShell 7.4 7.4.19.0
  • Microsoft PowerShell 7.5 7.5.10.0
  • Microsoft PowerShell 7.6 7.6.5
  • powershell Alpine 3.24 7.6.9-r0

alpine advisories ALPINE-CVE-2026-70338

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami powershell
>=7.4.0, <7.4.19
>=7.5.0, <7.5.10
>=7.6.0, <7.6.5
7.4.19
7.5.10
7.6.5

Affected products

  • Microsoft PowerShell 7.4
  • Microsoft PowerShell 7.5
  • Microsoft PowerShell 7.6

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

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.