Vulnerability · Published Oct 28, 2026 · Assigned by pretix

CVE-2026-101272Incorrect session validation for API-created shredder exports

Low 2.3

In plain English

A low-severity security flaw in pretix from pretix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 4.0)2.3Low

Exploit odds (30 days)0.3%top 71.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

The mechanism binding files generated during a shredding process to the authentication method is not working correctly and the same session token is used for all token-based API users. This is similar to an issue fixed in 2026.7.1 but was missed while creating the fix. Since the files are referred to by randomly generated UUIDs and only exist for a day, there is virtually no risk, but it renders the added protection mechanism useless. As part of the fix, we have also improved hardening of some other related code areas.

Affected products (as reported)

Vendor	Product	Versions
pretix	pretix	0 – before 2026.6.42026.7.0 – before 2026.7.32026.8.0 – before 2026.8.1

References

https://pretix.eu/about/en/blog/20261028-release-2026-8-1/ vendor-advisory