imgaug contains an insecure deserialization vulnerability in BackgroundAugmenter class within multicore.py module
Impact
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,…
Source excerpt · OSVAffected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
| Affected range | Recorded fix |
|---|---|
| Earlier releases through 0.4.0 (inclusive)Ecosystem versions | No fix recorded for this interval |
Version evidence: OSV · GHSA-g82g-j283-hj97
View original version evidence (11 explicit versions)
Original source description
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.
References
- Security advisory nvd.nist.gov/vuln/detail/CVE-2026-31235
- Source reference github.com/aleju/imgaug
- Security advisory github.com/pypa/advisory-database/tree/main/vulns/imgaug/PYSEC-2026-356.yaml
- Source reference pypi.org/project/imgaug
- Security advisory www.notion.so/CVE-2026-31235-35d1e139318881efb701d814228424a9