CVE-2026-83497
Authenticated deserialization RCE in OpenSearch SQL plugin via cursor parameter
Is CVE-2026-83497 being exploited?
Not confirmed. CVE-2026-83497 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 0.52% probability of exploitation in the next 30 days.
How severe is CVE-2026-83497?
CVE-2026-83497 is rated High with a CVSS score of 8.7. 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-2026-83497?
Yes. A fix has been recorded for CVE-2026-83497. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-83497 affect?
CVE-2026-83497 affects OpenSearch SQL plugin, OpenSearch versions prior to 2.19.6, OpenSearch versions prior to 3.7.0, Managed AWS OpenSearch Service instances (check vendor bulletin). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-83497?
Upgrade to OpenSearch 2.19.6 or 3.7.0 (or apply vendor/AWS patch) immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated remote code execution: attacker with read/search perms can send crafted cursor to /_plugins/sql to run arbitrary code on server.
Immediate action required
- affected>= 2.9 and <= 3.5
- affected>= 2.8 and <= 3.6
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.