CVE-2026-55374Network attack vectorHinoki check available

Authenticated API request redirection via unencoded path variables

Published Sep 15, 2026 · Updated Sep 15, 2026

SSRF in jleehr Canto SaaS API before 3.0.0 allows remote attackers to redirect authenticated API requests via crafted path variables. Request::buildRequestUrl() joins getPathVariables() values with slashes without encoding path segments, so traversal, query, or fragment delimiters alter the endpoint. Exploitation requires a consuming application to accept an untrusted path variable and can cause unintended reads or writes on the same Canto instance with the configured application's privileges.

CVSS severity4.8
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in jleehr Canto SaaS API before 3.0.0 allows remote attackers to redirect authenticated API requests via crafted path variables. Request::buildRequestUrl() joins getPathVariables() values with slashes without encoding path segments, so traversal, query, or fragment delimiters alter the endpoint. Exploitation requires a consuming application to accept an untrusted path variable and can cause unintended reads or writes on the same Canto instance with the configured application's privileges.

The record

CVE
CVE-2026-55374
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
jleehr
Product
Canto SaaS API
Classifications
CWE-918, CWE-74, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=< 3.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

jleehr · Canto SaaS APIversion=< 3.0.0

Published CVSS scores

4.8GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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