CVE-2026-47763Public exploit

Arbitrary file clobber via symlink-following writes

Published Aug 4, 2026 · Updated Aug 4, 2026

Symlink following in PDM before 2.27.0 allows attackers to overwrite local files by inducing PDM operations in a malicious repository. Config.init() resolves a project-local pdm.toml symlink, and _save_config() writes through it without lstat or O_NOFOLLOW protection. A user must run a state-writing command in the prepared checkout; pdm.toml targets must contain parseable TOML, while .pdm-python and .python-version do not share that constraint.

CVSS severity6.8
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Symlink following in PDM before 2.27.0 allows attackers to overwrite local files by inducing PDM operations in a malicious repository. Config.init() resolves a project-local pdm.toml symlink, and _save_config() writes through it without lstat or O_NOFOLLOW protection. A user must run a state-writing command in the prepared checkout; pdm.toml targets must contain parseable TOML, while .pdm-python and .python-version do not share that constraint.

The record

CVE
CVE-2026-47763
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
PDM Project
Product
PDM
Classifications
CWE-61, T1204
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=< 2.27.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

PDM Project · PDMversion=< 2.27.0

Published CVSS scores

6.8PDM ProjectCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-61UNIX Symbolic Link (Symlink) Following
T1204User Execution

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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