P4Verified

CVE-2026-49143: browserstack-runner 0 through 0.9.5

CVE-2026-49143. CVSS 3.1 base score 8.8 (HIGH, Vendor/CNA). EPSS 0.00671 (percentile 0.50411), scored 2026-10-06.

Affected technology

browserstack-runner · 0 through 0.9.5
browserstack

Description’s affected range: through 0.9.5

Component: Not specified by the source
Function: reference

Attack conditions (Vendor/CNA, CVSS 4.0): Adjacent network · No privileges required · No user interaction required

What an attacker can do

Unauthenticated network-adjacent attackers can execute arbitrary code by submitting crafted JSON request bodies to the handler, which passes user-supplied data to vm.runInNewContext() combined with eval(). Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality, integrity and availability impact as high.

Published 2026-10-08 17:34:45.917774+00:00

CWE: CWE-94
CCR priority: 35.4 /100 (P4)
CVSS 3.1: 8.8 /10 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · Vendor/CNA
EPSS: 0.00671 · percentile 0.50519 · 2026-10-08
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-08 17:36:22.845483+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-08 17:32:11.049884+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-49143.html