deps: bump github.com/jackc/pgx/v5 from 5.9.1 to 5.9.2

[dependabot]

Bumps github.com/jackc/pgx/v5 from 5.9.1 to 5.9.2.

Changelog

Sourced from github.com/jackc/pgx/v5's changelog.

5.9.2 (April 18, 2026)

Fix SQL Injection via placeholder confusion with dollar quoted string literals (GHSA-j88v-2chj-qfwx)

SQL injection can occur when:

1. The non-default simple protocol is used.
2. A dollar quoted string literal is used in the SQL query.
3. That query contains text that would be would be interpreted outside as a placeholder outside of a string literal.
4. The value of that placeholder is controllable by the attacker.

e.g.

attackValue := `$tag$; drop table canary; --`
_, err = tx.Exec(ctx, `select $tag$ $1 $tag$, $1`, pgx.QueryExecModeSimpleProtocol, attackValue)

This is unlikely to occur outside of a contrived scenario.

Commits

• 0aeabbc Release v5.9.2
• 60644f8 Fix SQL sanitizer bugs with dollar-quoted strings and placeholder overflow
• a5680bc Merge pull request #2531 from dolmen-go/godoc-add-links
• e34e452 doc: Add godoc links
• 08c9bb1 Fix Stringer types encoded as text instead of numeric value in composite fields
• 96b4dbd Remove unstable test
• acf88e0 Merge pull request #2526 from abrightwell/abrightwell-min-proto
• 2f81f1f Update max_protocol_version and min_protocol_version defaults
• See full diff in compare view

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[github-actions]

AI Code Review

Critical Issues

None

Moderate Issues

None

Minor Issues

None

What Looks Good

• The PR bumps github.com/jackc/pgx/v5 from v5.9.1 to v5.9.2, which includes a security fix for SQL injection via placeholder confusion with dollar-quoted string literals (GHSA-j88v-2chj-qfwx).
• The change is minimal and focused: only go.mod and go.sum are updated.
• No code changes are introduced that would affect the MDL pipeline, architecture, or functionality.
• The update follows semantic versioning (patch level) and addresses a genuine security concern.
• The project's external SQL connectivity (via sql/ package) uses this dependency, so the fix directly improves security for those features.

Recommendation

Approve. The dependency update is safe, necessary for security, and follows best practices for maintenance. No further changes are needed.

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