CVE-2026-101274

Quick assessment

Affected

pretix

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.

当 pretix 在客户账户的单点登录（SSO）配置中用作身份提供者时，系统未能正确验证授权请求中请求的是否与 SSO 客户端配置的授权类型（grant type）相匹配。这意味着，如果某个 SSO 客户端被配置为仅允许响应类型（该类型的使用需要知晓客户端密钥），但错误地请求了如之类的其他响应类型，系统仍会返回一个有效的令牌。要利用此漏洞，攻击者必须在指定的页面上执行 JavaScript 代码，而该页面必须来自客户端配置中允许的 URI 列表。

CVSS 6.9 · Medium Updated Oct 28, 2026

Possible ATT&CK Techniques 2 AI

T1551 T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

Vendor	Product	Version Range	Status
pretix	None	`< 2026.6.4`	affected
		`2026.7.0< 2026.7.3`	affected
		`2026.8.0< 2026.8.1`	affected

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Vulnerability Information

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Vulnerability Title

N/A

Source: CVE Program / CVE List V5

Vulnerability Description

When pretix is used as the identity provider in a Single-Sign-On (SSO) setup for customer accounts, the system did not properly validate the `response_type` requested in an authorization request against the configured grant type of the SSO client. This means that if an SSO client was configured to only allow the `code` response type, which requires knowledge of the client secret to use and would wrongfully send a response type like `id_token`, it would receive back a valid token. Exploiting this requires the attacker to run JavaScript on the page specified by `redirect_uri`, which must be from a list specified in the client configuration.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
pretix	-	0 ~ 2026.6.4	-

II. Public POCs for CVE-2026-101274

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-101274

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Security Blog Posts for CVE-2026-101274 (1)

🔗 Security release 2026.8.1 of pretix – pretix – Reinventing ticket sales for conferences, festivals, exhibitions, ... vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-101274

Same Patch Batch · pretix · 2026-10-28 · 3 CVEs total

CVE-2026-101273	5.3 MEDIUM	Giftcard enumeration
CVE-2026-101272	2.3 LOW	Incorrect session validation for API-created shredder exports

IV. Related Vulnerabilities

Same vendor: pretix