CVE-2026-52840

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Source

https://cve.org/CVERecord?id=CVE-2026-52840

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52840.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-52840

Aliases

GHSA-pm5p-7w5h-jm5q

Published

2026-07-14T15:23:59.992Z

Modified

2026-07-16T03:48:37.029255845Z

Severity

2.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N CVSS Calculator

Summary

Easy!Appointments has server-side request forgery in CalDAV connection test that exposes the deployment's internal network

Details

Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, Caldav::connect_to_server at application/controllers/Caldav.php:60 hands the request's caldav_url to a Guzzle REPORT call without scheme or host validation. A logged-in backend user (admin, provider, or secretary) reaches loopback, RFC1918, and link-local hosts on the deployment's network. The Guzzle exception path returns the upstream status code plus ~120 bytes of response body in the JSON message field (Caldav.php:74-78), so the SSRF is semi-blind. Version 1.6.0 contains a patch.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52840.json",
    "cwe_ids": [
        "CWE-918"
    ],
    "cna_assigner": "GitHub_M"
}

References

Affected packages

Git / github.com/alextselegidis/easyappointments

Affected ranges

Type

GIT

Repo

https://github.com/alextselegidis/easyappointments

Events

Introduced

Fixed

6eb9336a91cfb276379506625e81f5bd9ed3a536

Database specific

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.6.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*

1.1.0

1.1.0-beta.2

1.2.0-alpha.1

1.2.0-beta.1

1.3.0-alpha.1

1.3.0-beta.1

1.3.0-beta.2

1.5.0

1.5.0-alpha.1

1.5.0-beta.1

1.5.0-dev.1

1.5.0-dev.2

1.5.0-dev.3

1.5.0-dev.4

1.5.1

1.5.1-beta.1

1.5.2-beta.1

1.6.0-alpha.1

1.6.0-beta.1

1.6.0-beta.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52840.json"