Sample
Rack::Protection::PathTraversal unescapes URL-encoded directory traversal sequences and normalizes PATH_INFO for downstream Rack apps while restoring original PATH_INFO upon completion
sha256:df8ea16687e5ba850bb1732c11549e4bd03680bbefb9ee21a6bea68cc830c8a2
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- ruby
- Operating system
- linux
- Architecture
- x64
- Runtime
- ruby
- Language
- ruby
- Package manager
- gem
Verification-run environments
- Execution context
- ruby 3
- Operating system
- linux debian · glibc
- Architecture
- x64
- Runtime
- ruby 3
- Language
- ruby
- Package manager
- gem
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-17
Case
- Goal
- Rack::Protection::PathTraversal unescapes URL-encoded directory traversal sequences and normalizes PATH_INFO for downstream Rack apps while restoring original PATH_INFO upon completion HOW
- Packages
-
rack-protection 4.2.1
- Environment
- ruby
- Created
- 2026-08-17T14:38:56Z
Contract
- Rack::Protection::PathTraversal resolves URL-encoded dot segments and directory traversal sequences in PATH_INFO for downstream apps and restores the original path in an ensure block upon completion.
- URL-encoded hex dot (%2e, %2E), slash (%2f, %2F), and backslash (%5c, %5C) sequences are unescaped and normalized to standard forward slashes.
- Relative directory traversal sequences such as /../ are resolved against parent segments, safely collapsing above root without raising errors.
- Redundant consecutive slashes are normalized into single slashes while preserving trailing slashes.
- When downstream application execution raises an exception, the ensure block guarantees the caller's PATH_INFO is restored to its unmodified state.
- Empty or nil PATH_INFO values pass through without modification.
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- test/contract.rb
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- ruby 3 · linux debian/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-17 · ed25519:d91480838ac982c9