RCE in widely used PostgreSQL versions allows OS-level code execution; impacts many deployments and warrants broad IT attention.
CVE-2026-14669
PostgreSQL to_char(timestamptz) heap overflow enables OS-level RCE.
Can a WAF block it? No. This is a heap buffer overflow. Generic WAF rules do not recognise the input that triggers it; only a rule written for this specific CVE can, and only if the triggering request has a recognisable shape.
Also consider: patch
Based on the weakness type only; no CVE-specific evidence yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2026-14669 being exploited?
Not confirmed. CVE-2026-14669 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.66% probability of exploitation in the next 30 days.
How severe is CVE-2026-14669?
CVE-2026-14669 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-14669?
Yes. A fix has been recorded for CVE-2026-14669. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-14669 affect?
CVE-2026-14669 affects PostgreSQL < 18.5, PostgreSQL < 17.11, PostgreSQL < 16.15, PostgreSQL < 15.19, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-14669?
Upgrade to 18.5/17.11/16.15/15.19/14.24 or apply vendor patches; restrict timezone inputs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution as the OS user running PostgreSQL via a crafted POSIX timezone abbreviation (heap overflow).
Immediate action required
- affected>= 18 and < 18.6
- affected>= 17 and < 17.11
- affected>= 16 and < 16.15
- affected>= 15 and < 15.19
- affected< 14.24
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.