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CVE-2026-55190— Event Schedule Vulnerable to SSRF: isUrlSafe() bypassable via bracketed IPv6 literals (parse_url keeps the brackets so the IPv6 guard never matches) and a v4-only-resolver fail-open; reaches internal/localhost services on event import

Quick assessment

Affected
eventschedule eventschedule
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Event Schedule 是一个开源平台，用于分享活动、销售门票以及凝聚社区。在 1.0.0 及更早版本中， 被用作针对用户提供的导入 URL 的 SSRF（服务器端请求伪造）防护机制。该防护可通过两种方式绕过，导致在后续由 获取该 URL 时（先通过 获取响应体并解析导入为活动数据，再通过 获取 Open Graph 图片），可访问内部或 localhost 服务。截至发布之时，尚无公开可用的补丁。

CVSS 6.5 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
eventschedule eventschedule <= 1.0.0 affected
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I. Basic Information for CVE-2026-55190

Vulnerability Information
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Vulnerability Title
Event Schedule Vulnerable to SSRF: isUrlSafe() bypassable via bracketed IPv6 literals (parse_url keeps the brackets so the IPv6 guard never matches) and a v4-only-resolver fail-open; reaches internal/localhost services on event import
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
eventschedule eventschedule <= 1.0.0 -

II. Public POCs for CVE-2026-55190

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III. Intelligence Information for CVE-2026-55190

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Vendor Advisories for CVE-2026-55190 (1)

IV. Related Vulnerabilities

Same weakness: CWE-918

V. Comments for CVE-2026-55190

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