CVE-2026-82355: When a request to the Airflow core API carries both a session cookie and an explicit `Authorization: Bearer` t

Routine

MEDIUM 4.2WATCHLISTDOWNGRADE

CVE-2026-82355 is a medium-severity flaw (CVSS 4.2) affecting airflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When a request to the Airflow core API carries both a session cookie and an explicit `Authorization: Bearer` token, Airflow resolves the caller from the cookie and ignores the bearer token, inverting the intended precedence of bearer over cookie. The request then executes -- and is recorded in the audit log -- as the cookie's principal rather than the identity the client explicitly presented. Only Apache Airflow 3.3.0 and 3.3.1 are affected. Ear

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-384
Published	2026-09-21
Last modified	2026-09-25

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-09-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-21 15:17 UTCPublished CVE record published
2026-09-25 19:43 UTCUpdated Record last modified

apache airflow DOWNGRADE

Affected: 3.3.0 · 3.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.0

1. Check installed version

apt-cache policy airflow || rpm -q airflow || airflow --version

2. No fixed release: DOWNGRADE to a release before 3.3.0 (Debian / Ubuntu)

apt-cache madison airflow sudo apt install airflow=<VERSION_BEFORE_3.3.0> sudo apt-mark hold airflow

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list airflow sudo dnf downgrade airflow-<VERSION_BEFORE_3.3.0> sudo dnf versionlock add airflow

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-82355?

airflow: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-82355 being exploited?

CVE-2026-82355 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-82355 affect?

CVE-2026-82355 affects airflow. Severity is medium (CVSS 4.2). When a request to the Airflow core API carries both a session cookie and an explicit `Authorization: Bearer` token, Airflow resolves the caller from the cookie and ignores the bearer token, inverting the intended precedence of bearer over c

How urgent is CVE-2026-82355?

Priority 33/100. On your watchlist

Software pages

Apache Airflow vulnerabilities

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References

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