Sample
python-dotenv 1.2.2: Prevent arbitrary file overwrite (CVE-2026-28684) by refusing symlink traversal by default in set_key and unset_key in python-dotenv 1.2.2, requiring follow_symlinks=True to modify link targets
Verified sample for pypi python-dotenv 1.2.2: Prevent arbitrary file overwrite (CVE-2026-28684) by refusing symlink traversal by default in set_key and…
sha256:33635aca120c0b15d09d8012282cd38192d4e12f28010a4847473b74123440ad
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
python linux x64 python python pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-16 |
| python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-18 |
Case
HOW- Goal
- Prevent arbitrary file overwrite (CVE-2026-28684) by refusing symlink traversal by default in set_key and unset_key in python-dotenv 1.2.2, requiring follow_symlinks=True to modify link targets
- Packages
- Symbols
-
- dotenv.set_key
- dotenv.unset_key
- dotenv.main.rewrite
- Environment
- python
- Created
- 2026-08-16T07:54:37Z
Contract
- assert set_key, unset_key, and rewrite expose follow_symlinks parameter defaulting to False
- assert set_key on symlink replaces link with regular file and leaves target untouched when follow_symlinks=False
- assert set_key on symlink mutates target and preserves symlink when follow_symlinks=True
- assert unset_key on symlink obeys follow_symlinks flag to avoid unintended target file modification
Files
- NOTES.md
- csx.json
- requirements.txt
- src/__init__.py
- src/env_manager.py
- test/contract.py