PYSEC-2026-181
Vulnerability from pysec - Published: 2026-06-01 09:16 - Updated: 2026-06-03 10:54
VLAI
Details
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. /etc/passwd or airflow.cfg) or (b) supply a task_id containing .. sequences accepted by the Task SDK's KEY_REGEX (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured base_log_folder, 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 apache-airflow 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.
Severity
6.5 (Medium)
Impacted products
| Name | purl | apache-airflow | pkg:pypi/apache-airflow |
|---|
Aliases
{
"affected": [
{
"ecosystem_specific": {},
"package": {
"ecosystem": "PyPI",
"name": "apache-airflow",
"purl": "pkg:pypi/apache-airflow"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.2.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.10.0",
"1.10.1",
"1.10.10",
"1.10.10rc1",
"1.10.10rc2",
"1.10.10rc3",
"1.10.10rc4",
"1.10.10rc5",
"1.10.11",
"1.10.11rc1",
"1.10.11rc2",
"1.10.12",
"1.10.12rc1",
"1.10.12rc2",
"1.10.12rc3",
"1.10.12rc4",
"1.10.13",
"1.10.13rc1",
"1.10.14",
"1.10.14rc1",
"1.10.14rc2",
"1.10.14rc3",
"1.10.14rc4",
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"1.10.2",
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"1.10.2rc2",
"1.10.2rc3",
"1.10.3",
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"1.10.4b2",
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"1.10.8",
"1.10.8rc1",
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"1.8.1",
"1.8.2",
"1.8.2rc1",
"1.9.0",
"2.0.0",
"2.0.0b1",
"2.0.0b2",
"2.0.0b3",
"2.0.0rc1",
"2.0.0rc2",
"2.0.0rc3",
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"2.0.1rc1",
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"2.1.2",
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"2.1.4",
"2.1.4rc1",
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"2.10.1",
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"2.10.3",
"2.10.3rc1",
"2.10.3rc2",
"2.10.4",
"2.10.4rc1",
"2.10.5",
"2.10.5rc1",
"2.11.0",
"2.11.0rc1",
"2.11.1",
"2.11.1rc1",
"2.11.1rc2",
"2.11.2",
"2.11.2rc1",
"2.2.0",
"2.2.0b1",
"2.2.0b2",
"2.2.0rc1",
"2.2.1",
"2.2.1rc1",
"2.2.1rc2",
"2.2.2",
"2.2.2rc1",
"2.2.2rc2",
"2.2.3",
"2.2.3rc1",
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"2.2.4rc1",
"2.2.5",
"2.2.5rc1",
"2.2.5rc2",
"2.2.5rc3",
"2.3.0",
"2.3.0b1",
"2.3.0rc1",
"2.3.0rc2",
"2.3.1",
"2.3.1rc1",
"2.3.2",
"2.3.2rc1",
"2.3.2rc2",
"2.3.3",
"2.3.3rc1",
"2.3.3rc2",
"2.3.3rc3",
"2.3.4",
"2.3.4rc1",
"2.4.0",
"2.4.0b1",
"2.4.0rc1",
"2.4.1",
"2.4.1rc1",
"2.4.2",
"2.4.2rc1",
"2.4.3",
"2.4.3rc1",
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"2.5.0rc3",
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"2.5.2",
"2.5.2rc1",
"2.5.2rc2",
"2.5.3",
"2.5.3rc1",
"2.5.3rc2",
"2.6.0",
"2.6.0b1",
"2.6.0rc1",
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"2.6.0rc3",
"2.6.0rc4",
"2.6.0rc5",
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"2.7.2",
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"2.8.1",
"2.8.1rc1",
"2.8.2",
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"2.9.0rc3",
"2.9.1",
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"2.9.2",
"2.9.2rc1",
"2.9.3",
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"3.0.0rc1",
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"3.0.0rc1.post3",
"3.0.0rc1.post4",
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"3.0.2",
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"3.2.1rc3",
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"3.2.2rc2",
"3.2.2rc3"
]
}
],
"aliases": [
"CVE-2026-40861"
],
"details": "A Dag author could either (a) create a symlink under their task\u0027s log directory pointing to an arbitrary file readable by the API server process (read-path attack \u2014 e.g. `/etc/passwd` or `airflow.cfg`) or (b) supply a `task_id` containing `..` sequences accepted by the Task SDK\u0027s `KEY_REGEX` (write-path attack), and in both cases the FileTaskHandler resolves the log path outside the configured `base_log_folder`, 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 `apache-airflow` 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\u0027s filesystem.",
"id": "PYSEC-2026-181",
"modified": "2026-06-03T10:54:36.197008Z",
"published": "2026-06-01T09:16:17.893Z",
"references": [
{
"type": "ADVISORY",
"url": "http://www.openwall.com/lists/oss-security/2026/05/31/1"
},
{
"type": "ADVISORY",
"url": "https://lists.apache.org/thread/823334db2559xjlwt59gpzjz47thnscl"
},
{
"type": "FIX",
"url": "https://github.com/apache/airflow/pull/65325"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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