openssl-encrypt has no owner verification on key revocation — any client can revoke any key
Summary
The revoke_key method in openssl_encrypt_server/modules/keyserver/service.py at lines 195-270 accepts a client_id parameter but never verifies that the requesting client is the same as key.owner_client_id.
Impact
Any authenticated client can revoke any other client's key, as long as they provide a valid revocation signature. While the signature requirement mitigates this somewhat (you need the private key to sign), the lack of ownership check is a defense-in-depth gap.
Recommended Fix
- Add an ownership check: verify
client_id == key.owner_client_idbefore allowing revocation - Return 403 Forbidden if the requesting client does not own the key
Fix
Fixed in commit 05e45f3 on branch releases/1.4.x — added documentation that ML-DSA signature verification IS the cryptographic ownership check; added info-level logging on successful verification.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | openssl-encrypt | < 1.4.0 | 1.4.0 |
References
- https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-hvc7-763r-4f3h
- https://www.vulncheck.com/advisories/openssl-encrypt-before-missing-ownership-verification-via-revoke-key
- https://github.com/jahlives/openssl_encrypt/commit/05e45f393886b5bf7e924d2dd42099a9dd37f91d
- https://github.com/jahlives/openssl_encrypt
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U- Weakness (CWE)
CWE-862- Platform
- Python (PyPI)
- Package
openssl-encrypt- Disclosed
- 01.04.2026
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-3743 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-hvc7-763r-4f3h - CC BY 4.0
Vulnerability history: openssl-encrypt
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 60
- First → latest
- 03.2026 08.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 1
- Medium 15
- Unrated 42
Disclosures per year
- 2026: 60
-
openssl-encrypt has no owner verification on key revocation — any client can revoke any key this entry
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