CVE-2026-88937: high-severity vulnerability in knowns-dev knowns
knowns through 0.33.0 Path Traversal via Template Engine
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.7%
knowns through 0.33.0 fails to properly validate template destination paths in the code generation template engine, allowing attackers to read and write arbitrary files outside the project root. Attackers can supply malicious templates that traverse directories to overwrite shell profiles, steal credentials, or achieve persistent code execution on victim systems.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
knowns-dev · knownsRelated CVEs — knowns-dev knowns
In the same product, most dangerous first.
CVE-2026-86439HIGHknowns before 0.30.0 Path Traversal via MCP doc and memory toolsEPSS 1.1%CVE-2026-86538HIGHknowns before 0.30.0 Path Traversal via templateFile parameterEPSS 1.0%CVE-2026-86543CRITICALknowns before 0.30.0 Unauthenticated Management API ExposureEPSS 0.9%CVE-2026-88899CRITICALknowns before 0.31.0 External Control of Agent Working Directory via x-opencode-directory HeaderEPSS 0.8%CVE-2026-86541HIGHknowns before 0.30.0 Path Traversal via code.replace MCP actionEPSS 0.8%CVE-2026-86775HIGHknowns before 0.30.0 Path Traversal via Document APIEPSS 0.7%
References
https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/codegen/template_engine.go#L318-L344https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/codegen/template_engine.go#L625-L636https://github.com/knowns-dev/knowns/security/advisories/GHSA-68cq-4rwm-f7jrhttps://github.com/knowns-dev/knowns/security/advisories/GHSA-xjcg-5j3r-m6f9https://www.vulncheck.com/advisories/knowns-through-0.33.0-path-traversal-via-template-engine