CVE-2026-3087: If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...

Q: How do I fix CVE-2026-3087?

python: upgrade to newer than 3.14.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-3087 being exploited?

CVE-2026-3087 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-3087 affect?

CVE-2026-3087 affects python. Severity is high (CVSS 7.5). If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...`) then the archive will be extracted outside the target directory which is different than other operating systems. Only Windows i

Q: How urgent is CVE-2026-3087?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-3087 is a high-severity flaw (CVSS 7.5) affecting python. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...`) then the archive will be extracted outside the target directory which is different than other operating systems. Only Windows is affected by this vulnerability.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-27
Last modified	2026-10-26

Publisher (CNA): Python Software Foundation · Vendor: python

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-27 21:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

python python UPGRADE

Affected: <= 3.14.4 · 3.15.0 alpha1 · 3.15.0 alpha2 · 3.15.0 alpha3 · 3.15.0 alpha4 · 3.15.0 alpha5 · 3.15.0 alpha6 · 3.15.0 alpha7

Fixed in: newer than 3.14.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy python || rpm -q python || python --version

2. UPGRADE to newer than 3.14.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade python

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade python

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3087?

python: upgrade to newer than 3.14.4. Exact commands for each OS are on this page.

Is CVE-2026-3087 being exploited?

CVE-2026-3087 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3087 affect?

CVE-2026-3087 affects python. Severity is high (CVSS 7.5). If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...`) then the archive will be extracted outside the target directory which is different than other operating systems. Only Windows i

How urgent is CVE-2026-3087?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities · Windows vulnerabilities

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References

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