GHSA-wr76-29cr-67w8

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Source
https://github.com/advisories/GHSA-wr76-29cr-67w8
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-wr76-29cr-67w8/GHSA-wr76-29cr-67w8.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-wr76-29cr-67w8
Aliases
Downstream
Published
2026-06-01T09:31:14Z
Modified
2026-07-09T21:26:23Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Apache Airflow has a Deserialization of Untrusted Data vulnerability
Details

A bug in Apache Airflow's XCom PATCH endpoint PATCH /api/v2/xcomEntries/{key} allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. return_value) that the matching POST endpoint already validated against FORBIDDEN_XCOM_KEYS. The endpoint also accepted serialized payload shapes the triggerer's deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the FORBIDDEN_XCOM_KEYS validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to apache-airflow 3.2.2 or later to cover the PATCH-path bypass.

Database specific 
{
    "cwe_ids":  [
        "CWE-502"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-09T21:03:20Z",
    "nvd_published_at":  "2026-06-01T09:16:18Z",
    "severity":  "HIGH"
}
References

Affected packages

PyPI / apache-airflow

Package

Name
apache-airflow
View open source insights on deps.dev
Purl
pkg:pypi/apache-airflow

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.2.0
Fixed
3.2.2

Affected versions

3.*
3.2.0
3.2.1rc1
3.2.1rc2
3.2.1rc3
3.2.1
3.2.2rc1
3.2.2rc2
3.2.2rc3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-wr76-29cr-67w8/GHSA-wr76-29cr-67w8.json"