CVE-2026-88899: knowns before 0.31.0 External Control of Agent Working Directory via x-opencode-directory Header
knowns-dev · knowns
Fixed in 0.31.0 · Affected: knowns-dev before 0.31.0 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 57% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- knowns-dev · knownsbefore 0.31.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- knowns-dev
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-88899 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.