Auth bypass in Opensignlabs Opensign
CVE-2026-92794
OpenSign through 2.41.3 fails to validate caller identity in the getDocument cloud function when one-time-password verification is disabled. Attackers can supply a document identifier from guest signing links to retrieve complete document details including all signers' information, sender identity, and valid download tokens without authentication.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (48.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/OpenSignLabs/OpenSign/issues/2218 (issue-tracking)
- github.com/OpenSignLabs/OpenSign (product)
- github.com/OpenSignLabs/OpenSign/blob/v2.41.0/apps/OpenSignServer/cloud/parsefu… (technical-description)
- www.vulncheck.com/advisories/opensign-through-2.41.3-information-disclosure-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92794?
- CVE-2026-92794 is a high-severity vulnerability in Opensignlabs Opensign, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-09-16.
- How severe is CVE-2026-92794?
- High severity. CVSS v3 base score is 7.5 out of 10.