Skip to main content
VulnerabilityPublished

CVE-2026-6357: pip · Untrusted Functionality Inclusion

Affects pipSource CVE Database V5

0
Compare

Not known to be exploited · CVSS 5.3 Medium : upgrade to 26.1 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 26.1
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade pip to 26.1.

Affected software

ProductAffectedFixed in
Pip maintainerspipAffected
  • <26.1
Fixed in
  • 26.1
PyPIpippkg:pypi/pipOther threatsAffected
  • <26.1
Fixed in
  • 26.1
PyPIpippkg:pypi/pipOther threatsAffected
  • <26.1
Fixed in
  • 26.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade to pip version 26.1 or later once available. Meanwhile, it is recommended to carefully review the contents of packages before installation to mitigate risks associated with this vulnerability.

Description

CVE-2026-6357 is a medium severity vulnerability in pip versions prior to 26.1. The issue involves pip running its self-update check after installing wheel files, which requires importing well-known Python modules. This import was deferred to improve startup time but could lead to unintended module imports shortly after installation. The patch changes the self-update check to run before wheel installation to prevent this behavior. Users are advised to review package contents before installation.

References

Community reviews

Loading reviews…