6.9

CVE-2026-9349: calcom cal.diy

CVSS: 6.9v4.0MediumDeferred
Published 24-05-2026Last modified 26-05-2026
Open JSON

Vulnerability summary

CVE-2026-9349 is a medium (CVSS 6.9) vulnerability in calcom cal.diy. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
38/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.53%
0%100%
Low · +0.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 24-05-2026
    PublishedVulnerability first disclosed.
  2. 26-05-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServerSideProps of the file apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx of the component Generic React API. This manipulation of the argument cancelledBy/rescheduledBy causes information disclosure. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS metrics

7 scores · 2 sources · 4 versions

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

+0.11 pp

From 0.41% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    B59C44D1550C4B0F373Ca4Eb1C150994

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Calcom1 product
  • cal.diy4.9.0 | 4.9.1 | 4.9.2 | 4.9.3 | 4.9.4

1 vendor · 1 product

References

4 links