In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with the generated secret may be able to recover the JWT signing secret through offline brute-force, potentially enabling JWT forgery.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 13 Aug 2026 17:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Weak JWT Signing Secret Generation Enables Token Forgery in Zimbra Collaboration |
Thu, 13 Aug 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with the generated secret may be able to recover the JWT signing secret through offline brute-force, potentially enabling JWT forgery. | |
| First Time appeared |
Zimbra
Zimbra collaboration |
|
| Weaknesses | CWE-1241 | |
| CPEs | cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Zimbra
Zimbra collaboration |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-08-13T15:58:52.960Z
Reserved: 2026-08-12T22:03:36.180Z
Link: CVE-2026-73576
No data.
Status : Received
Published: 2026-08-13T16:19:06.923
Modified: 2026-08-13T16:19:06.923
Link: CVE-2026-73576
No data.
OpenCVE Enrichment
Updated: 2026-08-13T18:45:04Z
Weaknesses