PatchTheCVECVE-2026-67587: Apache Airflow's Task SDK rebuilt a `Callback` object from serialized data by re-running its constructor, whic
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HIGH 8.8WATCHLISTUPGRADE
CVE-2026-67587 is a high-severity flaw (CVSS 8.8) affecting airflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Apache Airflow's Task SDK rebuilt a `Callback` object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because `SyncCallback` is itself an Airflow class it passes the default `allowed_deserialization_classes` allow-list, so tightening that setting does not help. A Dag author — who controls a task instance's `next_kwargs` through the task execution API — can therefore cause an arbitrar
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 51%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2026-08-12 |
| Last modified | 2026-10-23 |
Publisher (CNA): Apache Software Foundation · Vendor: apache
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
apache airflow UPGRADE
Affected: >= 3.3.0 and < 3.3.1
Fixed in: 3.3.1
Safe to downgrade to: a release before 3.3.0
1. Check installed version
apt-cache policy airflow || rpm -q airflow || airflow --version
2. UPGRADE to 3.3.1 (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 3.3.0 (Debian / Ubuntu)
apt-cache madison airflow
sudo apt install airflow=<VERSION_BEFORE_3.3.0>
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_3.3.0>
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.
Exact fixes by distribution
Python (pip) · apache-airflow · FIXED · 3.3.1 · vulnerable: >= 3.3.0, < 3.3.1 · source
pip install --upgrade "apache-airflow>=3.3.1"
pip show apache-airflow
Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
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.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-67260 HIGH 7.3 UPGRADE Apache Airflow 3.3.0 moved human-in-the-loop tasks from the triggerer to a new `awaiting_input` task state swe
- CVE-2026-58076 HIGH 8.8 UPGRADE Apache Airflow's serialization layer reconstructed exception nodes by calling `import_string()` on a class nam
- CVE-2026-68968 HIGH 7.5 UPGRADE Apache Airflow's Backfill API authorized a request against a Dag id supplied by the caller whenever the `backf
- CVE-2026-65017 MEDIUM 6.5 UPGRADE Apache Airflow's Config API did not mask team-scoped sensitive configuration values in multi-team deployments
- CVE-2026-59242 MEDIUM 5.4 UPGRADE Apache Airflow's XCom `GET /api/v2/{...}/xcomEntries/{key}?deserialize=true` endpoint passed a string-literal