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Apache Airflow EUVDEUVD-2026-83945

| CVE-2026-86473 LOW
Insufficient Session Expiration (CWE-613)
2026-09-21 apache GHSA-9cmm-29p3-73gr

Severity by source

Vendor (apache) PRIMARY
LOW
qualitative
vuln.today AI
4.2 MEDIUM

AC:H because it requires a pre-stolen token plus the victim actively logging out; PR:L as the attacker wields a valid victim credential; impact bounded to the victim's own access (C:L/I:L).

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (apache).

Lifecycle Timeline

3
Metadata Corrected
Sep 21, 2026 - 15:40 vuln.today
tag: Python added
Analysis Generated
Sep 21, 2026 - 15:05 vuln.today
CVE Published
Sep 21, 2026 - 14:33 cve.org
LOW

DescriptionCVE.org

Apache Airflow: the Core API logout endpoint revokes only a session token presented as the _token cookie. When a client logs out presenting its credential as an Authorization bearer header instead, the endpoint returns its normal logout response but revokes nothing, so the token remains valid until it expires. An attacker who already holds a copy of that token keeps the victim's access after the victim has logged out and believes the session ended; the default token lifetime is 24 hours and is configurable.

Affects API clients that authenticate with a bearer token rather than the browser session cookie. The attacker must already possess a copy of a valid token; obtaining one is outside the scope of this issue, and no privileges beyond the victim's own are gained.

Users of apache-airflow are recommended to upgrade to apache-airflow version 3.3.2 or later, which fixes the issue.

AnalysisAI

Logout in Apache Airflow Core API versions before 3.3.2 silently fails to revoke the caller's credential when it is presented as an Authorization: Bearer header rather than the browser _token session cookie, returning a normal logout response while nothing is invalidated. The token therefore stays usable until its natural expiry, 24 hours by default and configurable, so an authenticated attacker who already holds a copy of that token keeps the victim's access after the victim has logged out and believes the session ended; no privileges beyond the victim's own are obtained and obtaining the token is outside the scope of this issue. …

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Vulnerability AssessmentAI

Exploitation Applies only to Apache Airflow deployments before 3.3.2 whose API clients authenticate with an `Authorization: Bearer` token (the documented API auth method) rather than the browser `_token` session cookie - cookie-based sessions are logged out correctly and are unaffected. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine but low-severity session-management flaw, not a high-impact issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to apache-airflow 3.3.2 or later, which is the vendor-released patch and the only complete fix; the change is upstream in PR 72649 (https://github.com/apache/airflow/pull/72649) and described in the advisory at https://lists.apache.org/thread/k9z1p0q1ng8m68nlnv9d1fqzscrfm7vr. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-83945 vulnerability details – vuln.today

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