CVE-2026-5205Public exploitNetwork attack vector

Authenticated SSRF via unrestricted webhook destination

Published Mar 31, 2026 · Updated Mar 31, 2026

SSRF in Chatwoot 4.11.0 through 4.11.2 allows remote authenticated users to send server-side POST requests to chosen URLs. Webhooks::Trigger passes a user-controlled HTTP or HTTPS URL directly to RestClient::Request.execute after validating only its format, without blocking private or internal destinations. A user with webhook or automation-creation permission can trigger requests from the Chatwoot host to probe internal services or forward conversation and contact data to an attacker-controlled endpoint.

CVSS severity6.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Chatwoot 4.11.0 through 4.11.2 allows remote authenticated users to send server-side POST requests to chosen URLs. Webhooks::Trigger passes a user-controlled HTTP or HTTPS URL directly to RestClient::Request.execute after validating only its format, without blocking private or internal destinations. A user with webhook or automation-creation permission can trigger requests from the Chatwoot host to probe internal services or forward conversation and contact data to an attacker-controlled endpoint.

The record

CVE
CVE-2026-5205
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
Chatwoot
Product
Chatwoot
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.11.0
  2. Affected versionversion=4.11.1
  3. Affected versionversion=4.11.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chatwoot · Chatwootversion=4.11.0; version=4.11.1; version=4.11.2

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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