VulnSocial

CVE-2026-27736Disclosure(bigbluebutton / bigbluebutton)

LOWCVSS 6.1 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

bigbluebutton CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-601

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • bigbluebutton

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked at 2 mentions on most recent observed day (2026-02-26)
  • 3 total mentions across 2 days

Affected systems

Vendors
bigbluebutton
Products
bigbluebutton

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-02-25: 1Mentions · 2026-02-26: 2Technical Details · 2026-02-25: 1Technical Details · 2026-02-26: 202-2502-26
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-02-251
Disclosure1
2026-02-262
Disclosure2
Full discourse3 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-27736 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… https://www.cve.org/CVERecord?id=CVE-2026-27736 ----- Traducción: CVE-2026-27736 Big… http://infoflow.cloud`

    Post summary

    The post announces CVE‑2026‑27736 affecting BigBlueButton 3.x prior to 3.0.20, noting a lack of validation on errorRedirectUrl, but provides no PoC, exploit, or patch details.

    0000038
    55 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-27736 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… https://www.cve.org/CVERecord?id=CVE-2026-27736

    Post summary

    The CVE-2026-27736 vulnerability in BigBlueButton 3.x (before 3.0.20) involves an unvalidated errorRedirectUrl string, potentially allowing exploitation. No patch, PoC, or active exploitation details are provided.

    00000189
    56.6K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-27736 Open Redirect Vulnerability in BigBlueButton 3.x Versions Prior to 3.0.20 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-27736

    Post summary

    The text announces an open redirect vulnerability in BigBlueButton versions prior to 3.0.20, identified as CVE-2026-27736, with no additional details on exploitation or mitigation.

    0000071
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appbigbluebuttonbigbluebutton---

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