CVE-2026-32274
Black is the uncompromising Python code formatter. Starting in version 24.3.0 and prior to version 26.3.1, Black writes a cache file, the name of which is computed from various formatting options. The value of the --python-cell-magics option was placed in the filename without sanitization, which allowed an attacker who controls the value of this argument to write cache files to arbitrary file system locations. Fixed in Black 26.3.1.
CVSS
- Versión: 4.0
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Puntuación base: 8.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.72%
- Percentil entre todas las CVEs puntuadas: 52
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access75 % - Impacto principal
T1565.001Stored Data Manipulationimpact80 %
CWE-22 (path traversal) en argumento no sanitizado permite escritura de archivos en ubicaciones arbitrarias; acceso de red sin autenticación (AV:N/PR:N) contra herramienta accesible.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-22
- CWE-22
Referencias
- https://access.redhat.com/errata/RHSA-2026:10184
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:13553
- https://access.redhat.com/security/cve/CVE-2026-32274
- https://bugzilla.redhat.com/show_bug.cgi?id=2447111
- https://github.com/psf/black/commit/4937fe6cf241139ddbfc16b0bdbb5b422798909d
- https://github.com/psf/black/commit/ed770ba4dd50c419148a0fca2b43937a7447e1f9
- https://github.com/psf/black/pull/4176
- https://github.com/psf/black/pull/5038
- https://github.com/psf/black/releases/tag/26.3.1
- https://github.com/psf/black/security/advisories/GHSA-3936-cmfr-pm3m
- https://github.com/pypa/advisory-database/tree/main/vulns/black/PYSEC-2026-2121.yaml
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32274.json
- https://access.redhat.com/errata/RHSA-2026:10184
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:13553
- https://access.redhat.com/security/cve/CVE-2026-32274
- https://bugzilla.redhat.com/show_bug.cgi?id=2447111
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32274.json
JSON original (NVD)
Mostrar
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},
{
"type": "Secondary",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"description": [
{
"lang": "en",
"value": "CWE-22"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Black is the uncompromising Python code formatter. Starting in version 24.3.0 and prior to version 26.3.1, Black writes a cache file, the name of which is computed from various formatting options. The value of the --python-cell-magics option was placed in the filename without sanitization, which allowed an attacker who controls the value of this argument to write cache files to arbitrary file system locations. Fixed in Black 26.3.1."
},
{
"lang": "es",
"value": "Black es el formateador de código Python intransigente. Antes de la versión 26.3.1, Black escribe un archivo de caché, cuyo nombre se calcula a partir de varias opciones de formato. El valor de la opción --python-cell-magics se colocaba en el nombre del archivo sin sanitización, lo que permitía a un atacante que controla el valor de este argumento escribir archivos de caché en ubicaciones arbitrarias del sistema de archivos. Corregido en Black 26.3.1."
}
],
"lastModified": "2026-08-03T21:16:38.527",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:python:black:*:*:*:*:*:python:*:*",
"vulnerable": true,
"matchCriteriaId": "FB28127C-B646-45A8-AD1B-077310486F5F",
"versionEndExcluding": "26.3.1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security-advisories@github.com"
}