PatchTheCVECVE-2026-59242: Apache Airflow's XCom `GET /api/v2/{...}/xcomEntries/{key}?deserialize=true` endpoint passed a string-literal
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Routine
MEDIUM 5.4WATCHLISTUPGRADE
CVE-2026-59242 is a medium-severity flaw (CVSS 5.4) affecting airflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Apache Airflow's XCom `GET /api/v2/{...}/xcomEntries/{key}?deserialize=true` endpoint passed a string-literal payload through `BaseXCom.deserialize_value` without the `_check_forbidden_xcom_keys` guard, allowing an authenticated API user with XCom write-and-read access to instantiate arbitrary `airflow.*` classes on the API server (CWE-502). An authenticated user who can write an XCom value and then read it back with `deserialize=true` triggers t
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 56%) |
| 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: < 3.3.1
Fixed in: 3.3.1
Safe to downgrade to: no unaffected older release
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.
Exact fixes by distribution
Python (pip) · apache-airflow · FIXED · 3.3.1 · vulnerable: < 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.
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