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Vulnerabilities

Vulnerability · CVE-2026-40861

A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack — e.g.

Published Jun 1, 2026 · catalog updated Jul 21, 2026 · A Dag author could

Check if you run it

No confirmed exploitation is on record for CVE-2026-40861. EPSS is 0.76%. Act only if a listed version of A Dag author could is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A Dag author could).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.76%
Remediation
Advisory link
Affected products
cpe apache/airflow

A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack — e.g. or ) or (b) supply a containing sequences accepted by the Task SDK's (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured , leaking or overwriting arbitrary files. Only affects deployments where the worker log folder is shared with the API server. Users are advised to upgrade to 3.2.2 or later. As a defense-in-depth mitigation, deploy the worker and API server with separate log volumes so that worker-controlled paths cannot reach the API server's filesystem.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/airflowversion unspecified

How to fix CVE-2026-40861

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-40861. EPSS is 0.76%. Act only if a listed version of A Dag author could is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-59: Link Following. EPSS 0.76%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 1, 2026 · NIST NVD

    Detected

    A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack — e.g. or ) or (b) supply a containing sequences accepted by the Task SDK's (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured , leaking or overwriting arbitrary files. Only affects de

  2. Jul 21, 2026 · NIST NVD

    Updated

    A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack — e.g. or ) or (b) supply a containing sequences accepted by the Task SDK's (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured , leaking or overwriting arbitrary files. Only affects de

Sources

  • CVE.orgVulnerability recordCVE-2026-40861

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-40861

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDVulnerability recordCVE-2026-40861

    A Dag author could either (a) create a symlink under their task's log directory pointing to an arbitrary file readable by the API server process (read-path attack — e.g. or ) or (b) supply a containing sequences accepted by the Task SDK's

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.