Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

zopefoundation/transaction

              master @ 5c0e211
            

Fixes

CVEs

HIGH

Peak severity

Highlights

Auth Bypass: 1 prior fix. Scrutinize any change in this area.

transaction/_manager.py: most-fixed (1 issue). Treat as high-risk during review.

1 high-severity fix in this history; regressions here are high-impact.

Recurring patterns

The bug types that recur here, drawn from past fixes, not open vulnerabilities.

Auth Bypass: The transaction manager historically relied on recycled thread identifiers to map transactions to execution contexts. This allowed a new thread with a recycled ID to hijack an active transaction from a terminated thread, leading to a severe authentication bypass and data leakage. Developers must ensure that any transaction manager implementations inherit from thread-local storage rather than manually tracking thread lifetimes.