CVE-2026-6357: pip · Untrusted Functionality Inclusion
Affects pipSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium : upgrade to 26.1 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 27 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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.
- brew-python@3.11-cve-2026-6357
- homebrew
- brew-python@3.12-cve-2026-6357
- brew-python-freethreading-cve-2026-6357
What to do
Upgrade pip to 26.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Pip maintainerspip | Affected
| Fixed in
|
PyPIpippkg:pypi/pipOther threats | Affected
| Fixed in
|
PyPIpippkg:pypi/pipOther threats | Affected
| Fixed in
|
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.