CVE-2026-41905Public exploitNetwork attack vector

Internal resource disclosure via unchecked redirect destination

Published May 7, 2026 · Updated May 7, 2026

SSRF in FreeScout before 1.8.217 allows remote attackers to read internal HTTP resources through attacker-controlled redirects. Helper::sanitizeRemoteUrl() follows redirects but passes the original URL, rather than the final destination, back to checkUrlIpAndHost(). An unauthenticated sender can reach the flaw through an inline image in inbound email, exposing response bodies from cloud metadata, internal APIs, or RFC1918 services.

CVSS severity7.7
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in FreeScout before 1.8.217 allows remote attackers to read internal HTTP resources through attacker-controlled redirects. Helper::sanitizeRemoteUrl() follows redirects but passes the original URL, rather than the final destination, back to checkUrlIpAndHost(). An unauthenticated sender can reach the flaw through an inline image in inbound email, exposing response bodies from cloud metadata, internal APIs, or RFC1918 services.

The record

CVE
CVE-2026-41905
Published
May 7, 2026
Updated
May 7, 2026
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-918, T1046, T1552.005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 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=< 1.8.217

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeScout · FreeScoutversion=< 1.8.217

Published CVSS scores

7.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery
T1552.005Cloud Instance Metadata API

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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