Path Traversal in sapper
Priority LOW 38CWE-22Published · Updated
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub.
Summary
Versions of `sapper` prior to 0.27.11 are vulnerable to Path Traversal. It is possible to access sensitive files on the server through HTTP requests containing URL-encoded `../`. You may test a `sapper` application running in prod mode with `curl -vvv http://localhost:3000/client/750af05c3a69ddc6073a/%252e%252e/%252e%252e/%252e%252e/%252e%252e/%252e%252e/%252e%252e/%252e%252e/%252e%252e/etc/passwd`. ## Recommendation Upgrade to version 0.27.11 or later.
Why it matters now
Fix Fixed sapper (npm): 0.27.11
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | sapper (npm) | before 0.27.11 | 0.27.11 | Patch available | GHSA-f3vw-587g-r29g |
- sapper (npm) Vendor— Affected before 0.27.11 Fixed in 0.27.11 Patch available GHSA-f3vw-587g-r29g
Remediation
- Fix · GHSA-f3vw-587g-r29g sapper (npm) Fixed in 0.27.11 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-f3vw-587g-r29g
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences