critical · 9.8 No patch yet

imgaug contains an insecure deserialization vulnerability in BackgroundAugmenter class within multicore.py module

CVE-2026-31235 · GHSA-g82g-j283-hj97 · PYSEC-2026-356 · published 12 May 2026

How serious is it

  • Severity: critical, CVSS score 9.8 out of 10.
  • No exploit prediction (EPSS) score yet.
  • Not on the CISA list of exploited vulnerabilities.
  • No public exploit in Exploit-DB.

Is your app affected by CVE-2026-31235?

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Who is affected

  • imgaug (PyPI) <= 0.4.0

How to check

  1. Run pip show imgaug in your project to see the installed version, including copies pulled in by other packages.
  2. Or paste your lockfile into the checker: it lists every package with a known vulnerability, this one included.
  3. Or run npx shippable-dev scan localhost:3000 in your project folder. It reads your lockfile and flags this vulnerability along with every other known one.

How to fix

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  1. No fixed version of imgaug yet. Replace or remove it, or apply the workaround in the advisory below.
  2. If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

The imgaug library thru 0.4.0 contains an insecure deserialization vulnerability in its BackgroundAugmenter class within the multicore.py module. The class uses Python's pickle module to deserialize data received via a multiprocessing queue in the _augment_images_worker() method without any safety checks. An attacker who can influence the data placed into this queue (e.g., through social engineering, malicious input scripts, or a compromised shared queue) can provide a malicious pickle payload. When deserialized, this payload can execute arbitrary code in the context of the worker process, leading to remote or local code execution depending on the deployment scenario.

Check your whole app

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References

Merged from GitHub Advisory Database, OSV. Last updated 28 Oct 2026. All vulnerabilities · RSS · JSON

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