CVE-2026-55557High▾ Twilightbrowse-mcp is a Playwright-based headless-browser MCP server for MCP-capable agents. Prior to 0.8.2, browser_download writes a fetched response body to join(save_dir, filename) without validating the caller-controlled save_dir, while bro…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Aug 26.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
browse-mcp is a Playwright-based headless-browser MCP server for MCP-capable agents. Prior to 0.8.2, browser_download writes a fetched response body to join(save_dir, filename) without validating the caller-controlled save_dir, while browser_save_state and browser_load_state honor a caller-controlled path unchanged. A malicious MCP client, or an autonomous agent steered by indirect prompt injection on a visited page, can choose an arbitrary save_dir or state path and a URL whose response body becomes attacker-controlled file contents, allowing writes to any path the process can reach, including ~/.bashrc, autostart entries, or cron files, and potentially leading to host code execution. The force_fetch fallback also uses a raw fetch() that bypasses the BROWSE_MCP_ALLOWED_ORIGINS origin fence. This issue is fixed in version 0.8.2.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
browse-mcp <= 0.8.1Patched in:
browse-mcp 0.8.2Connected by shared product, vendor, weakness, or advisory.
CVE-2023-7260High· 7.5Path Traversal vulnerability discovered in OpenText™ CX-E Voice, affecting all version through 22.4
CVE-2023-7249Critical· 9.8Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in OpenText OpenText Directory Services allows Path Traversal.This issue affects OpenText Directory Services: from 16.4.2 before 24.1.
CVE-2020-3365Medium· 4.3A vulnerability in the directory permissions of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, remote attacker to perform a directory traversal attack on a limited set of restricted directories
CVE-2020-3236Medium· 6.7A vulnerability in the CLI of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, local attacker to gain root shell access to the underlying operating system and overwrite or read arbitrary files
CVE-2010-2861Critical· 9.8Multiple directory traversal vulnerabilities in the administrator console in Adobe ColdFusion 9.0.1 and earlier allow remote attackers to read arbitrary files via the locale parameter to (1) CFIDE/administrator/settings/mappings.cfm, (2)…
CVE-2021-20023Medium· 4.9SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.