GHSA-HVC7-763R-4F3H
Vulnerability from github – Published: 2026-04-01 21:11 – Updated: 2026-04-01 21:11
VLAI
Summary
openssl-encrypt has no owner verification on key revocation — any client can revoke any key
Details
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.
Severity
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "openssl-encrypt"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-862"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-01T21:11:32Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Summary\n\nThe `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`.\n\n### Impact\n\nAny authenticated client can revoke any other client\u0027s 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.\n\n### Recommended Fix\n\n- Add an ownership check: verify `client_id == key.owner_client_id` before allowing revocation\n- Return 403 Forbidden if the requesting client does not own the key\n\n### Fix\n\nFixed in commit `05e45f3` on branch `releases/1.4.x` \u2014 added documentation that ML-DSA signature verification IS the cryptographic ownership check; added info-level logging on successful verification.",
"id": "GHSA-hvc7-763r-4f3h",
"modified": "2026-04-01T21:11:32Z",
"published": "2026-04-01T21:11:32Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-hvc7-763r-4f3h"
},
{
"type": "WEB",
"url": "https://github.com/jahlives/openssl_encrypt/commit/05e45f393886b5bf7e924d2dd42099a9dd37f91d"
},
{
"type": "PACKAGE",
"url": "https://github.com/jahlives/openssl_encrypt"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "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",
"type": "CVSS_V4"
}
],
"summary": "openssl-encrypt has no owner verification on key revocation \u2014 any client can revoke any key"
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
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- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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