CVE-2026-76848
HIGHCVE-2026-76848 is a high-severity (CVSS 7.5) SQL Injection vulnerability. O3 Security confirms whether CVE-2026-76848 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
TypeORM's SelectQueryBuilder.distinctOn accepts an array of strings and stores it on the expression map without validation. For PostgreSQL-family drivers, createSelectDistinctExpression…
Description
TypeORM's SelectQueryBuilder.distinctOn accepts an array of strings and stores it on the expression map without validation. For PostgreSQL-family drivers, createSelectDistinctExpression in src/query-builder/SelectQueryBuilder.ts joins that array and interpolates the result into the generated statement as SELECT DISTINCT ON (values), with no escaping, quoting, identifier validation or allowlist, and without routing the values through replacePropertyNames or the driver's escape helper. Because the interpolation point is a parenthesized SQL expression list rather than an identifier-only position, a supplied element may carry arbitrary expressions, including correlated subqueries. An application that forwards a client-controlled value into distinctOn, for instance to let a caller choose a deduplication column, allows that client to read data anywhere the application's database role can reach through boolean or time-based inference, independently of the entity being queried. validateOrderByCondition, the allowlist check guarding the orderBy family in the same class, is not applied to this path.
Detection & mitigation playbook
VulnerabilityDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of the affected component has shipped for CVE-2026-76848 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2026-76848 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2026-76848. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-76848 in your dependencies?
O3 detects CVE-2026-76848 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.