CVE-2026-49143Disclosure

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

BrowserStack Runner through 0.9.5 contains a remote code execution vulnerability in the /_log HTTP handler that allows unauthenticated network-adjacent attackers to execute arbitrary code by submitting crafted JSON request bodies to the handler, which passes user-supplied data to vm.runInNewContext() combined with eval(). Attackers can escape the Node.js vm sandbox by leveraging a host-context Function reference through util.format to access the host process via this.constructor.constructor, achieving full remote code execution on the underlying system without any authentication.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-94

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked 1d ago at 2 mentions (2026-06-03); latest day: 1
  • 3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-06-03: 2Mentions · 2026-06-04: 1Technical Details · 2026-06-03: 2Technical Details · 2026-06-04: 106-0306-04
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-06-032
Disclosure2
2026-06-041
Disclosure1
Full discourse3 posts
  • DailyCVE@dailycve
    Disclosure

    🔴 BrowserStack Runner, Code Injection, #CVE-2026-49143 (High) -DC-Jun2026-202 https://dailycve.com/browserstack-runner-code-injection-cve-2026-49143-high-dc-jun2026-202/

    Post summary

    The post announces a high‑severity code injection vulnerability in BrowserStack Runner, providing a link to further details but no PoC, exploit code, or patch information.

    0000045
    208 followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-49143 BrowserStack Runner through 0.9.5 contains a remote code execution vulnerability in the /_log HTTP handler that allows unauthenticated network-adjacent attackers to e… https://www.cve.org/CVERecord?id=CVE-2026-49143 ----- Traducción: CVE-2026-49143 Bro… http://infoflow.cloud`

    Post summary

    The tweet announces CVE‑2026‑49143, detailing a remote code execution issue in BrowserStack Runner's _log handler, but does not provide any proof of concept, exploit code, or patch information.

    0000043
    79 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-49143 BrowserStack Runner through 0.9.5 contains a remote code execution vulnerability in the /_log HTTP handler that allows unauthenticated network-adjacent attackers to e… https://www.cve.org/CVERecord?id=CVE-2026-49143

    Post summary

    The text announces CVE‑2026‑49143 as a remote code execution flaw in BrowserStack Runner 0.9.5, providing basic technical details but no exploit code, patch info, or evidence of active attacks.

    00000214
    57.6K followersView on X

Explore more