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Advisory record · GHSA-77xj-x4rm-935c

datamodel-code-generator: Protobuf weak-import path traversal allows files to be written outside the temporary directory

CVSS 7.5 HighEPSS 0.0053 · 45th percentile

Published by the GitHub Advisory Database at 8 Oct 2026, 17:58 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
datamodel-code-generatorPyPI>=0.59.0, <0.81.00.81.0
Identifiers
GHSA-77xj-x4rm-935c · CVE-2026-107377 · PYSEC-2026-4205
Weakness (CWE)
CWE-22 · CWE-73
Tags
Published
8 Oct 2026
Updated
15 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

datamodel-code-generator versions 0.59.0 up to but not including 0.81.0 can write files outside the intended temporary directory when processing a Protobuf schema with malicious weak-import paths. An attacker who gets a user or CI job to process a crafted .proto file, supplied locally or via --url, can create files and directories where the process has write access and can overwrite existing writable files using relative traversal; written content is limited to a generated proto syntax line. Upgrade to datamodel-code-generator 0.81.0 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0053, the 45th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.