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CVE Vulnerability Details :
CVE-2026-27736
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-25 Feb, 2026 | 16:27
Updated At-26 Feb, 2026 | 21:33
Rejected At-
▼CVE Numbering Authority (CNA)
BigBlueButton has Open Redirect vulnerability in ApiController

BigBlueButton is an open-source virtual classroom. In versions on the 3.x branch prior to 3.0.20, the string received with errorRedirectUrl lacks validation, using it directly in the respondWithRedirect function leads to an Open Redirect vulnerability. BigBlueButton 3.0.20 patches the issue. No known workarounds are available.

Affected Products
Vendor
bigbluebutton
Product
bigbluebutton
Versions
Affected
  • >= 3.0.0, < 3.0.20
Problem Types
TypeCWE IDDescription
CWECWE-601CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Type: CWE
CWE ID: CWE-601
Description: CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
Metrics
VersionBase scoreBase severityVector
3.16.1MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-65cv-rg9f-qqrx
x_refsource_CONFIRM
https://github.com/bigbluebutton/bigbluebutton/commit/691f92f3af0d6b796b91cb968977068663119812
x_refsource_MISC
Hyperlink: https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-65cv-rg9f-qqrx
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/bigbluebutton/bigbluebutton/commit/691f92f3af0d6b796b91cb968977068663119812
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found