CVE-2026-41889 jackc CVE debrief

Who should care

Organizations using pgx in Go applications, especially code paths that enable the simple protocol and build SQL with dollar-quoted string literals or other placeholder-sensitive query patterns. Security and application teams maintaining database access layers should review affected versions and query construction.

Technical summary

According to the vendor advisory and NVD record, the flaw is a SQL injection condition in pgx prior to 5.9.2. It requires all of the following to line up: the non-default simple protocol is used, the SQL query includes a dollar-quoted string literal, that literal contains text that would be parsed as a placeholder outside a string literal, and the value for that placeholder is controllable by an attacker. NVD maps the weakness to CWE-89 and lists the affected version range as versions before 5.9.2. The published fix is in pgx 5.9.2, with a corresponding patch commit and release notes referenced by the advisory.

Defensive priority

Moderate for exposed applications that use pgx with the simple protocol and dynamically influenced SQL. The CVSS score is low, but SQL injection can still have meaningful impact in the affected code paths, so upgrade planning should not be deferred if the vulnerable pattern is present.

Recommended defensive actions

• Upgrade pgx to version 5.9.2 or later.
• Search code for use of the non-default simple protocol and review any query paths that include dollar-quoted string literals.
• Check whether attacker-influenced values can flow into placeholders in SQL built through the affected pattern.
• Prefer safer query construction patterns and minimize dynamic SQL where possible.
• Validate database-access unit and integration tests against the updated pgx version before deployment.

Evidence notes

All claims are grounded in the supplied CVE description, the NVD record, and the linked GitHub advisory, release notes, and patch commit. The CVE was published on 2026-05-08 and last modified on 2026-05-21. The NVD record identifies the affected range as versions before 5.9.2 and cites CWE-89.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.