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

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-31235: 0.47% estimated exploitation activity in the next 30 days; percentile 40.91 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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.

Published by the source

12 May 2026, 18:30 UTC

Last modified by the source

27 Oct 2026, 17:27 UTC

Source last checked

28 Oct 2026, 06:05 UTC

1. Revision 5 · amended · 28 Oct 2026

   Amended from osv record GHSA-g82g-j283-hj97

2. Revision 4 · amended · 27 Oct 2026

   Amended from ghsa record GHSA-g82g-j283-hj97

3. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-g82g-j283-hj97

4. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-g82g-j283-hj97

5. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-g82g-j283-hj97

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# Patch Next advisory brief: CVE-2026-31235

Advisory: imgaug contains an insecure deserialization vulnerability in BackgroundAugmenter class within multicore.py module
IDs: CVE-2026-31235, GHSA-g82g-j283-hj97
Record: https://patchnext.com/advisories/cve-2026-31235 (revision 5, source checked 28 Oct 2026, 06:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI imgaug: affected <= 0.4.0

## Suggested inspection (read-only)
- `python -m pip show imgaug`: prints the installed version. Run with the environment that serves production active.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on imgaug.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-g82g-j283-hj97 (GitHub-reviewed advisory GHSA-g82g-j283-hj97 lists affected ranges: PyPI imgaug >=0 <=0.4.0)
- Verified: https://osv.dev/vulnerability/GHSA-g82g-j283-hj97 (OSV record GHSA-g82g-j283-hj97 lists affected ranges: PyPI imgaug >=0 <=0.4.0)

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