CVE-2026-31235: Imgaug Imgaug Contains An Insecure Deserialization Vulnerability

CRITICAL
Advisory Identifier: GHSA-g82g-j283-hj97
Share
CVSS 9.8
CWE-502
Published
Advisory Summary

CVE-2026-31235 is a CRITICAL (CVSS 9.8) imgaug contains an insecure deserialization vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Imgaug libraries in the PyPI ecosystem. The issue involves imgaug contains an insecure deserialization vulnerability in backgroundaugmenter class within multicore.py module. Remediation is available in the latest vendor maintenance releases.

CVE-2026-31235 at a Glance

CVE Identifier CVE-2026-31235
GHSA Identifier GHSA-g82g-j283-hj97
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Imgaug
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-31235

To remediate this vulnerability, upgrade all affected Imgaug dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

imgaug fixed: Latest secure release 
pip install imgaug>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show imgaug

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-31235, inspect your installed packages using pip:

pip show imgaug

Analyze the terminal output to locate any version of Imgaug in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show imgaug command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Imgaug, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-31235 Affected Imgaug Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
imgaug
pypi/imgaug
PyPI
≤ 0.4.0

References

NVD — CVE-2026-31235 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31235
Imgaug Source Repository REPOSITORY
https://github.com/aleju/imgaug
www.notion.so/cve-2026-31235-35d1... WEB
https://www.notion.so/CVE-2026-31235-35d1e139318881efb701d814228424a9

Frequently Asked Questions

What is CVE-2026-31235?
CVE-2026-31235 is a security vulnerability in Imgaug involving imgaug contains an insecure deserialization vulnerability in BackgroundAugmenter class within multicore.py module under CWE-502: Deserialization of Untrusted Data.
Which Imgaug versions are affected?
Affected versions include releases prior to current release patches across affected packages: imgaug.
What version fixes CVE-2026-31235?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is imgaug affected?
Yes, imgaug is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-31235?
CVE-2026-31235 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-31235?
CVE-2026-31235 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check PyPI dependencies for CVE-2026-31235?
Run the dependency tree command: 'pip show imgaug'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g82g-j283-hj97",
  "modified" : "2026-05-27T22:25:43Z",
  "published" : "2026-05-12T18:30:41Z",
  "aliases" : [ "CVE-2026-31235" ],
  "summary" : "imgaug contains an insecure deserialization vulnerability in BackgroundAugmenter class within multicore.py module",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "imgaug"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-31235"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/aleju/imgaug"
  }, {
    "type" : "WEB",
    "url" : "https://www.notion.so/CVE-2026-31235-35d1e139318881efb701d814228424a9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-27T22:25:43Z",
    "nvd_published_at" : "2026-05-12T18:16:51Z"
  }
}