CVE-2026-121557

WPPConnect Server through 2.10.74 Missing Authentication via /api/:session/chatwoot

8.2 High

WPPConnect Server through 2.10.74 contains a missing authentication vulnerability that allows unauthenticated attackers to send WhatsApp messages by calling the Chatwoot webhook route without verifyToken middleware. Attackers who know or guess a connected session name can POST outgoing message bodies to send arbitrary texts or files from that account to any number.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

0.41%Unchanged since Nov 4, 2026

What each source reports

CVE List Score used 8.2

WPPConnect Server through 2.10.74 Missing Authentication via /api/:session/chatwoot

Record: CVE-2026-121557
CVSS 4.0: 8.2 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-07

EUVDEUVD-2026-115902 8.2

Record: EUVD-2026-115902
CVSS 4.0: 8.2 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N
Updated: 2026-11-07

GitHub AdvisoriesGHSA-cj7j-h23p-3c8m 8.2

WPPConnect Server through 2.10.74 contains a missing authentication vulnerability that allows...

Record: GHSA-cj7j-h23p-3c8m
CVSS 4.0: 8.2 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-03

NVD 8.2

Record: CVE-2026-121557
CVSS 4.0: 8.2 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-306
Updated: 2026-11-07

OSV 8.2

WPPConnect Server through 2.10.74 Missing Authentication via /api/:session/chatwoot

Record: CVE-2026-121557
CVSS 4.0: 8.2 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N
Weakness: CWE-306
Updated: 2026-11-08

Affected products

wppconnect wppconnect-server

History

History
Recorded	Changed	Sources
Nov 4, 2026	references	OSV
Nov 3, 2026	published	EUVD
Nov 3, 2026	published	EUVD
Nov 3, 2026	aliases, references	GitHub Advisories, NVD
Nov 3, 2026	cwes, facts, references, severity, title	CVE List
Nov 3, 2026	first indexed	EUVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-121557 is a high vulnerability (CVSS 8.2) in Wppconnect Wppconnect-server, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.