CVE-2026-9304 (GCVE-0-2026-9304)

Vulnerability from cvelistv5 – Published: 2026-05-23 13:45 – Updated: 2026-05-26 13:57
VLAI
Title
calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery
Summary
A security flaw has been discovered in calcom cal.diy up to 4.9.4. The affected element is the function validateUrlForSSRF of the file apps/web/app/api/logo/route.ts of the component Logo API. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. Attacks of this nature are highly complex. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
5 (Medium)
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery
Assigner
References
URL Tags
https://vuldb.com/vuln/365251 vdb-entrytechnical-description
https://vuldb.com/vuln/365251/cti signaturepermissions-required
https://vuldb.com/submit/812176 third-party-advisory
https://gist.github.com/YLChen-007/b3d0b85767b7e3… exploit
Impacted products
Vendor Product Version
calcom cal.diy Affected: 4.9.0
Affected: 4.9.1
Affected: 4.9.2
Affected: 4.9.3
Affected: 4.9.4
    cpe:2.3:a:calcom:cal.diy:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Eric-z (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.