CVE-2026-4519
Estado: ModificadaAlta (7)—
The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open().
CVSS
- Versión: 4.0
- Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/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: 7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.39%
- Percentil entre todas las CVEs puntuadas: 31
- 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
T1203Exploitation for Client Executionexecution85 % - Impacto principal
T1059Command and Scripting Interpreterexecution75 %
Requiere interacción del usuario (UI:A) al abrir URL con dashes que se interpretan como opciones de línea de comandos en navegadores, permitiendo ejecución de código. CWE-20 valida input insuficientemente.
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-20
- CWE-88
Referencias
- https://github.com/python/cpython/commit/3681d47a440865aead912a054d4599087b4270dd
- https://github.com/python/cpython/commit/43fe06b96f6a6cf5cfd5bdab20b8649374956866
- https://github.com/python/cpython/commit/591ed890270c5697b013bf637029fb3e6cd2d73e
- https://github.com/python/cpython/commit/594b5a05dc9913880ac92eded440defbf32a28d1
- https://github.com/python/cpython/commit/82a24a4442312bdcfc4c799885e8b3e00990f02b
- https://github.com/python/cpython/commit/89bfb8e5ed3c7caa241028f1a4eac5f6275a46a4
- https://github.com/python/cpython/commit/9669a912a0e329c094e992204d6bdb8787024d76
- https://github.com/python/cpython/commit/96fc5048605863c7b6fd6289643feb0e97edd96c
- https://github.com/python/cpython/commit/ad4d5ba32af4d80b0dfa2ba9d8203bfb219e60a5
- https://github.com/python/cpython/commit/cbba6119391112aba9c5aebf7b94aea447922c48
- https://github.com/python/cpython/commit/cc023511238ad93ecc8796157c6f9139a2bb2932
- https://github.com/python/cpython/commit/ceac1efc66516ac387eef2c9a0ce671895b44f03
- https://github.com/python/cpython/issues/143930
- https://github.com/python/cpython/pull/143931
- https://mail.python.org/archives/list/security-announce@python.org/thread/AY5NDSS433JK56Q7Q5IS7B37QFZVVOUS/
- http://www.openwall.com/lists/oss-security/2026/03/20/1
- https://access.redhat.com/errata/RHSA-2026:10065
- https://access.redhat.com/errata/RHSA-2026:10101
- https://access.redhat.com/errata/RHSA-2026:10102
- https://access.redhat.com/errata/RHSA-2026:10111
- https://access.redhat.com/errata/RHSA-2026:10140
- https://access.redhat.com/errata/RHSA-2026:10141
- https://access.redhat.com/errata/RHSA-2026:13812
- https://access.redhat.com/errata/RHSA-2026:16008
- https://access.redhat.com/errata/RHSA-2026:16009
- https://access.redhat.com/errata/RHSA-2026:16030
- https://access.redhat.com/errata/RHSA-2026:16174
- https://access.redhat.com/errata/RHSA-2026:19019
- https://access.redhat.com/errata/RHSA-2026:19064
- https://access.redhat.com/errata/RHSA-2026:19175
- https://access.redhat.com/errata/RHSA-2026:19176
- https://access.redhat.com/errata/RHSA-2026:19177
- https://access.redhat.com/errata/RHSA-2026:19216
- https://access.redhat.com/errata/RHSA-2026:19724
- https://access.redhat.com/errata/RHSA-2026:19725
- https://access.redhat.com/errata/RHSA-2026:21275
- https://access.redhat.com/errata/RHSA-2026:25096
- https://access.redhat.com/errata/RHSA-2026:6016
- https://access.redhat.com/errata/RHSA-2026:6035
- https://access.redhat.com/errata/RHSA-2026:6256
- https://access.redhat.com/errata/RHSA-2026:6281
- https://access.redhat.com/errata/RHSA-2026:6283
- https://access.redhat.com/errata/RHSA-2026:6285
- https://access.redhat.com/errata/RHSA-2026:6286
- https://access.redhat.com/errata/RHSA-2026:6473
- https://access.redhat.com/errata/RHSA-2026:6766
- https://access.redhat.com/errata/RHSA-2026:7010
- https://access.redhat.com/errata/RHSA-2026:7244
- https://access.redhat.com/errata/RHSA-2026:7329
- https://access.redhat.com/errata/RHSA-2026:7335
- https://access.redhat.com/errata/RHSA-2026:7443
- https://access.redhat.com/errata/RHSA-2026:7661
- https://access.redhat.com/errata/RHSA-2026:8746
- https://access.redhat.com/errata/RHSA-2026:8747
- https://access.redhat.com/errata/RHSA-2026:8748
- https://access.redhat.com/errata/RHSA-2026:9042
- https://access.redhat.com/errata/RHSA-2026:9260
- https://access.redhat.com/errata/RHSA-2026:9261
- https://access.redhat.com/errata/RHSA-2026:9262
- https://access.redhat.com/errata/RHSA-2026:9289
- https://access.redhat.com/errata/RHSA-2026:9354
- https://access.redhat.com/errata/RHSA-2026:9386
- https://access.redhat.com/errata/RHSA-2026:9387
- https://access.redhat.com/errata/RHSA-2026:9591
- https://access.redhat.com/errata/RHSA-2026:9614
- https://access.redhat.com/errata/RHSA-2026:9621
- https://access.redhat.com/errata/RHSA-2026:9705
- https://access.redhat.com/errata/RHSA-2026:9745
- https://access.redhat.com/security/cve/CVE-2026-4519
- https://bugzilla.redhat.com/show_bug.cgi?id=2449649
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4519.json
JSON original (NVD)
Mostrar
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