An authentication bypass vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated remote attacker to mint MASTER_KEY-signed file access tokens for arbitrary stored files via the getsignedurl Parse cloud function. The function skips its isAuthenticated check whenever any docId parameter is supplied, even one corresponding to no real document, allowing the authentication gate to be bypassed by supplying an arbitrary string as docId.
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Fixes
Solution
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Workaround
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References
| Link | Providers |
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| https://github.com/OpenSignLabs/OpenSign |
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History
Mon, 10 Aug 2026 19:30:00 +0000
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ssvc
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Mon, 10 Aug 2026 12:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | An authentication bypass vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated remote attacker to mint MASTER_KEY-signed file access tokens for arbitrary stored files via the getsignedurl Parse cloud function. The function skips its isAuthenticated check whenever any docId parameter is supplied, even one corresponding to no real document, allowing the authentication gate to be bypassed by supplying an arbitrary string as docId. | |
| Title | OpenSignLabs opensignserver - Authentication Bypass | |
| Weaknesses | CWE-288 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: TuranSec
Published:
Updated: 2026-08-10T18:22:08.110Z
Reserved: 2026-08-10T11:55:39.471Z
Link: CVE-2026-72691
Updated: 2026-08-10T15:37:54.790Z
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OpenCVE Enrichment
Updated: 2026-08-10T19:00:04Z
Weaknesses