CVE-2026-88899
- Source
- https://cve.org/CVERecord?id=CVE-2026-88899
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88899.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-88899
- Aliases
-
- GHSA-9h2q-r9fh-f98w
- Published
- 2026-09-10T15:28:51Z
- Modified
- 2026-10-21T03:00:03Z
- Severity
-
- 9.3 (Critical) CVSS_V4 - 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 CVSS Calculator
- Summary
- knowns before 0.31.0 External Control of Agent Working Directory via x-opencode-directory Header
- Details
-
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.
- Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-73" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88899.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88899.json
- https://github.com/knowns-dev/knowns/releases/tag/v0.31.0
- https://github.com/knowns-dev/knowns/security/advisories/GHSA-9h2q-r9fh-f98w
- https://nvd.nist.gov/vuln/detail/CVE-2026-88899
- https://www.vulncheck.com/advisories/knowns-before-0.31.0-external-control-of-agent-working-directory-via-x-opencode-directory-header
- https://github.com/knowns-dev/knowns/commit/37db0561b37b48b8bd035a417d7f1da6258ae657
- https://github.com/knowns-dev/knowns/blob/v0.30.0/internal/server/server.go#L1283-L1296
Affected packages
Git / github.com/knowns-dev/knowns
Affected ranges
- Type
- GIT
- Repo
- https://github.com/knowns-dev/knowns
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "0.31.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "37db0561b37b48b8bd035a417d7f1da6258ae657" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v0.31.0", "range": [ { "fixed": "193ab83f6dbe1a6d4a0cf63283c57d6a93bea9ef" } ], "source": "REFERENCES_TAG" } ] }
Affected versions
v0.*
v0.1.1
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.10.0
v0.10.1
v0.10.2
v0.10.3
v0.10.4
v0.10.5
v0.10.6
v0.11.0
v0.11.1
v0.11.2
v0.11.3
v0.11.4
v0.12.0
v0.12.1
v0.12.2
v0.12.3
v0.12.4
v0.15.0
v0.15.1
v0.15.2
v0.15.3
v0.16.0
v0.16.1
v0.16.2
v0.16.3
v0.17.0
v0.17.1
v0.18.0
v0.18.1
v0.18.2
v0.18.3
v0.18.4
v0.19.0
v0.19.1
v0.19.2
v0.2.0
v0.2.1
v0.20.0
v0.20.1
v0.20.2
v0.20.3
v0.20.4
v0.20.5
v0.21.0
v0.22.0
v0.22.1
v0.22.2
v0.23.0
v0.24.0
v0.24.1
v0.25.0
v0.26.0
v0.27.0
v0.27.1
v0.28.0
v0.29.0
v0.29.1
v0.3.0
v0.3.1
v0.30.0
v0.4.0
v0.5.0
v0.6.0
v0.7.0
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.8.5
v0.8.6
v0.8.7
v0.8.8
v0.8.9
v0.9.0