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GHSA-x5wm-j6wh-2834: Apache Airflow has an Incorrect Authorization issue

lowCVSS 3.1CVE-2026-45426
Exploitation requires the attacker to already be an authenticated Airflow worker holding a valid Log-server JWT issued for at least one Dag. Apache Airflow's Log server authorized JWT tokens against Dag IDs by applying Python's str.lstrip() to the requested path segment when verifying the JWT's sub claim. str.lstrip() strips any of a *set* of characters from the left (not a prefix), so a JWT issued for a Dag named e.g. dag_a would authorize log access to any other Dag whose name began with any subset of the characters {d, a, g, _} (e.g. dag_attacker, aaaa_target, _dag_secret). Such an authenticated worker could enumerate and read worker logs of other Dags whose names happened to share that character-class prefix, leaking task output and error traces beyond the documented per-Dag isolation boundary. Affects deployments relying on per-Dag log-access scoping (multi-team, shared-executor, shared-worker topologies). Users are advised to upgrade to apache-airflow 3.2.2 or later.

Details

Source
GitHub Security Advisories (INTL · database · site)
Severity
low — CVSS 3.1
Published
2026-06-01
Last updated
2026-07-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://github.com/advisories/GHSA-x5wm-j6wh-2834

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-45426coverage & exploitation statusNVD · CVE.org

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