CVE-2026-88899
knowns versions before 0.31.0 fail to properly validate the x-opencode-directory request header in the /api/opencode proxy endpoint. Remote attackers can supply arbitrary directory paths to execute file operations outside the project root on the host system.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.8
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CWE
- CWE-73
- Published
- 2026-09-10
- Last modified
- 2026-09-10
Affected products
- knowns-dev knowns
- knowns-dev knowns
Weakness type
Related vulnerabilities
- CVE-2026-53956 — Rattler vulnerable to package cache path traversal via conda package build string
- CVE-2026-86751 — Snipe-IT before 8.7.0 Arbitrary File Read and SSRF via Markdown
- CVE-2026-86741 — Snipe-IT before 8.7.0 Arbitrary File Read and SSRF via Category EULA
- CVE-2026-79692 — Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to...
- CVE-2026-87815 — SiYuan before v3.8.2 Path Traversal via removeRiffDeck
- CVE-2026-53581 — ntp: write path traversal
- CVE-2026-86995 — n8n: Git Node branch.<name>.remote Config Key Bypasses Sandbox Path Restriction, Enabling Local Git Repository Read
- CVE-2026-78620 — Improper Path Validation in Okta Access Gateway Kerberos Configuration Handling