CVE-2026-93637CWE-307

CVE-2026-93637

Low · published October 14, 2026

CVSS v3.1
3.7
EPSS
0%
Percentile
20.9
In the wild
Unconfirmed
What it is

An authentication rate-limit bypass in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows unauthenticated attackers to make repeated password guesses through GraphQL without incrementing Zimbra’s source-IP failure counter. GraphQL aliases allow multiple authentication attempts in one HTTP request.

The record
Technical detail
CVSS v3.1
3.7 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00294 · 20.9th percentile
Weakness
CWE-307 · Improper Restriction of Excessive Authentication Attempts
Published
2026-10-14T21:20Z
References (1)
https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1 · [email protected]
EPSS history
Timeline
  • 16 OCT 03:33Z
    EPSS moved — → 0%
    epss
  • 14 OCT 16:25Z
    Zimbra Collaboration Suite GraphQL Batched Authentication Bypasses Pre-Auth Rate Limiting
    cvelistv5
  • 14 OCT 16:25Z
    Zimbra Collaboration Suite GraphQL Batched Authentication Bypasses Pre-Auth Rate Limiting
    cvelistv5