CVE-2026-88899

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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
2026-09-12T11:31:00Z
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

Affected packages

Git / github.com/knowns-dev/knowns

Affected ranges

Type
GIT
Repo
https://github.com/knowns-dev/knowns
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
193ab83f6dbe1a6d4a0cf63283c57d6a93bea9ef
Fixed
37db0561b37b48b8bd035a417d7f1da6258ae657
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.31.0"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88899.json"