CVE-2026-48812Public exploitNetwork attack vector

Unauthenticated attachment disclosure via legacy-token bypass

Published Jul 20, 2026 · Updated Jul 20, 2026

Improper authentication in FreeScout before 1.8.221 allows remote attackers to read legacy attachments through its public download route. OpenController::downloadAttachment combines a token mismatch with the nonlegacy token-type test using AND, so legacy records make the denial condition false. Exposure requires an installation upgraded from an older release with token_type 1 records; affected files can be derived from sequential attachment IDs and deterministic storage paths.

CVSS severity7.5
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in FreeScout before 1.8.221 allows remote attackers to read legacy attachments through its public download route. OpenController::downloadAttachment combines a token mismatch with the nonlegacy token-type test using AND, so legacy records make the denial condition false. Exposure requires an installation upgraded from an older release with token_type 1 records; affected files can be derived from sequential attachment IDs and deterministic storage paths.

The record

CVE
CVE-2026-48812
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 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=< 1.8.221

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeScout · FreeScoutversion=< 1.8.221

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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-287Improper Authentication
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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