CVE-2026-82049Public exploitHinoki check available

File modification and disclosure via hard-link symlink resolution

Published Sep 14, 2026 · Updated Sep 14, 2026

Path traversal in CPython 3.13 and earlier allows attackers to alter external file metadata or expose file contents via a crafted tar archive. The tarfile data and tar extraction filters let a hard-link member resolve through an extracted symbolic link, causing attribute updates and linked content to escape the destination. An application must extract an attacker-controlled archive on a filesystem supporting the crafted link chain; impact is limited to permissions, timestamps, and file contents.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in CPython 3.13 and earlier allows attackers to alter external file metadata or expose file contents via a crafted tar archive. The tarfile data and tar extraction filters let a hard-link member resolve through an extracted symbolic link, causing attribute updates and linked content to escape the destination. An application must extract an attacker-controlled archive on a filesystem supporting the crafted link chain; impact is limited to permissions, timestamps, and file contents.

The record

CVE
CVE-2026-82049
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Python Software Foundation
Product
CPython
Classifications
T1222, T1005
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.14.0

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Python Software Foundation · CPythonversion=0 <3.14.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1222File and Directory Permissions Modification
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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