Summary
canto-saas-api: Authenticated API requests can be redirected via unencoded path variables
In affected versions, Request::buildRequestUrl() inserts path variables into
the request URL without URL encoding (implode('/', $pathVariables)). All
request classes implementing getPathVariables() are affected, e.g.
GetContentDetailsRequest (scheme, contentId).
If a consuming application passes untrusted input (such as an ID taken from
an HTTP request parameter) as a path variable, characters like ../, ? or
# are sent verbatim and can change the path of the resulting API request.
Impact
An attacker who controls a path variable value can redirect the
library's authenticated request, the Bearer access token is attached in
AbstractEndpoint::sendRequest(), to a different API endpoint of the same
Canto instance, causing unintended reads or writes with the privileges of the
configured app. The impact depends on how the consuming application sources
path variable values; applications that only pass trusted, validated IDs are
not exploitable.
Patches
Fixed in 3.0.0: every path segment is encoded with rawurlencode() before
being inserted into the request URL.
Workarounds
If you cannot upgrade, validate untrusted values before passing them to
request classes, e.g. enforce an allowlist pattern such as
^[A-Za-z0-9_-]+$ for content IDs and schemes.
Impact
Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.
CVE-2026-55374 has a CVSS score of 4.8 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.0.0); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is CVE-2026-55374? CVE-2026-55374 is a medium-severity server-side request forgery (SSRF) vulnerability in jleehr/canto-saas-api (composer), affecting versions <= 2.0.0. It is fixed in 3.0.0. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
- How severe is CVE-2026-55374? CVE-2026-55374 has a CVSS score of 4.8 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of jleehr/canto-saas-api are affected by CVE-2026-55374? jleehr/canto-saas-api (composer) versions <= 2.0.0 is affected.
- Is there a fix for CVE-2026-55374? Yes. CVE-2026-55374 is fixed in 3.0.0. Upgrade to this version or later.
- Is CVE-2026-55374 exploitable, and should I be worried? Whether CVE-2026-55374 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-55374 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-55374? Upgrade
jleehr/canto-saas-apito 3.0.0 or later.