CVE-2026-45426: Exploitation requires the attacker to already be an authenticated Airflow worker holding a valid Log-server JW

Routine

LOW 3.1WATCHLISTUPGRADE

CVE-2026-45426 is a low-severity flaw (CVSS 3.1) affecting airflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 authori

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-06-01
Last modified	2026-07-21

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

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-01 09:16 UTCPublished CVE record published
2026-07-21 19:10 UTCUpdated Record last modified

apache airflow UPGRADE

Affected: >= 3.0.0 and < 3.2.2

Fixed in: 3.2.2

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to 3.2.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade airflow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade airflow

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison airflow sudo apt install airflow=<VERSION_BEFORE_3.0.0> sudo apt-mark hold airflow

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list airflow sudo dnf downgrade airflow-<VERSION_BEFORE_3.0.0> 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-2026-45426?

airflow: upgrade to 3.2.2. Exact commands for each OS are on this page.

Is CVE-2026-45426 being exploited?

CVE-2026-45426 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-2026-45426 affect?

CVE-2026-45426 affects airflow. Severity is low (CVSS 3.1). 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(

How urgent is CVE-2026-45426?

Priority 23/100. On your watchlist

Software pages

Python vulnerabilities · Apache Airflow vulnerabilities

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References

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