PatchaPalooza

CVE-2026-13346: pip absolute path traversal during download from malicious package indexes

CVE-2026-13346 is a vulnerability in pip absolute path traversal during download from malicious package indexes, rated Moderate by Microsoft. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.29% probability of exploitation activity in the next 30 days, higher than 22% of all scored vulnerabilities. Microsoft released the fix on 6 August 2026, outside Patch Tuesday. It affects 4 products in 1 product family (Open Source Software).

Key facts

CVE ID
CVE-2026-13346
Severity
N/A
Microsoft severity
Moderate
Exploited in the wild
No
Publicly disclosed
No
Weakness
CWE-36
EPSS
0.29% (percentile 22%)
CISA KEV
Not listed
Released
Last updated
Patch Tuesday
July 2026 Patch Tuesday
Product families
Open Source Software

Affected products (4)

Open Source Software

ProductSecurity updateTypeFixed buildRestart
azl3 python-virtualenv 20.36.1-5 on Azure Linux 3.0CBL-Mariner ReleasesSecurity Update20.36.1-6No
azl3 python-pip 24.2-10 on Azure Linux 3.0
azl3 python-virtualenv 20.36.1-6 on Azure Linux 3.0
azl3 python-pip 24.2-9 on Azure Linux 3.0

NIST NVD data

NVD status
Analyzed
NVD CVSS
6.5 (MEDIUM)
NVD weakness
CWE-36
Published to NVD
NVD last modified

Affected configurations (CPE)

ProductVulnerable versions
pipbefore 26.2

References

Revision history

VersionDateDescription
1.0Information published.
2.0Information published.
2.0Information published.
2.0Information published.
3.0Information published.
4.0Information published.
5.0Information published.

Sources