CVE Explorer
CVE-2026-42359
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
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"collectionURL":"https://pypi.python.org","defaultStatus":"unaffected","packageName":"apache-airflow","product":"Apache Airflow","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.2.2","status":"affected","version":"3.2.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:4153e314af72df9d67ba44c48307d00e49802f873ea7591347b5db73d4a83728 · sha256:667b28b897c2e69b… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:4153e314af72df9d67ba44c48307d00e49802f873ea7591347b5db73d4a83728 · sha256:667b28b897c2e69b… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-502","description":"CWE-502: Deserialization of Untrusted Data","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:4153e314af72df9d67ba44c48307d00e49802f873ea7591347b5db73d4a83728 · sha256:667b28b897c2e69b… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"tags":["patch"],"url":"https://github.com/apache/airflow/pull/65915"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4153e314af72df9d67ba44c48307d00e49802f873ea7591347b5db73d4a83728 · sha256:667b28b897c2e69b… · /containers/cna/references/0
{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/g8dqykpf1p90tysq8tln4qtkqwb1038s"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4153e314af72df9d67ba44c48307d00e49802f873ea7591347b5db73d4a83728 · sha256:667b28b897c2e69b… · /containers/cna/references/1
{"tags":["related"],"url":"https://www.cve.org/CVERecord?id=CVE-2026-33858"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4153e314af72df9d67ba44c48307d00e49802f873ea7591347b5db73d4a83728 · sha256:667b28b897c2e69b… · /containers/cna/references/2
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.