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TI-2026-79754 Aliases CVE-2026-55190

Server-side request forgery in Event Schedule URL import

Priority LOW 28CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

Event Schedule versions up to and including 1.0.0 contain a server-side request forgery flaw (CWE-918) in the URL check applied to user-supplied event import URLs. The check in isUrlSafe() can be bypassed in two ways, so a crafted import URL makes the server fetch internal or localhost services. A remote attacker with low privileges can read data from those internal services. No publicly available patch exists at the time of publication.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Event Schedule is an open-source platform to share events, sell tickets and bring communities together. In versions 1.0.0 and prior, App\Utils\UrlUtils::isUrlSafe() is the SSRF guard applied to user-supplied import URLs. It can be bypassed two ways, both reaching internal/localhost services when the URL is later fetched by ImportCuratorEvents (Http::get($url) then the response body is parsed and imported as events, and file_get_contents($ogImage)). At time of publication, there are no publicly available patches.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00263 18th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
eventscheduleeventscheduleup to 1.0.0—No fix listedCNA
  • eventschedule Vendoreventschedule Affected up to 1.0.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for eventschedule.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-55190
  2. 2026-10-24 Priority changed: MEDIUM → LOW
  3. 2026-10-29 CISA SSVC decision points changed

References

Other 1

Sources

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