CVE-2026-63393

OpenSearch SQL plugin: Unsafe cursor deserialization permits server code execution

CVSS score

8.7

EPSS probability

—

Risk score

0.9

Published

2 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-63393: OpenSearch SQL Plugin Unsafe Cursor Deserialization Vulnerability

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A vulnerability in the OpenSearch SQL plugin allows a remote authenticated user to trigger unsafe deserialization of untrusted data via a crafted cursor parameter, resulting in arbitrary code execution on the server.

Why does it matter?

This vulnerability allows authenticated users with basic read and search permissions to achieve arbitrary code execution on the server, posing a high risk to confidentiality, integrity, and availability.

What should be done?

Follow vendor advisories
Apply available repository releases and fixes
Verify system version ranges

Chain of evidence and sources2 verified claims

CVE-2026-63393, OpenSearch SQL eklentisindeki güvensiz seri durumdan çıkarma nedeniyle sunucuda kod çalıştırılmasına izin verir.

S0 · daybreach-canonical S1 · cvelist

Etkilenen sürümler 2.x serisinde 2.8.0.0 ile 2.19.6.0 arası ve 3.x serisinde 3.7.0.0 öncesidir.

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

OpenSearch SQL supports querying OpenSearch data using SQL and Piped Processing Language. In the 2.x line from 2.8.0.0 until 2.19.6.0, and the 3.x line prior to 3.7.0.0, a remote authenticated user with basic read/search permissions can provide a crafted `cursor` parameter to the `plugins/sql` endpoint and trigger unsafe deserialization of untrusted data, resulting in arbitrary code execution on the server. This issue is fixed in repository releases 2.19.6.0 and 3.7.0.0.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CWE: CWE-502

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-63393 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	opensearch-project	sql	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
8.7	CVSS V4_0	HIGH	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CVE CNA
8.7	CVSS V40	HIGH	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-63393 is associated with the following CWEs:

CWE-502: Deserialization of Untrusted Data

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-63393 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsLow

UserGerekmiyor

Official Sources and Advisories

https://github.com/opensearch-project/sql/security/advisories/GHSA-r8cv-xvqm-4qj4vendor-advisory https://github.com/opensearch-project/sql/pull/5469vendor-advisory https://github.com/opensearch-project/sql/pull/5572vendor-advisory https://github.com/opensearch-project/sql/commit/402a284f1dff3545236480b67f860aa93fb667devendor-advisory https://github.com/opensearch-project/sql/commit/9ab50384d3ad571a14211415fba2f6d26d4c80dbvendor-advisory https://github.com/opensearch-project/sql/releases/tag/2.19.6.0vendor-advisory https://github.com/opensearch-project/sql/releases/tag/3.7.0.0vendor-advisory

CVSS Vector Radar Chart

8.7 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow privileges

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

opensearch-project

Weakness Type (CWE & CAPEC)

CWE-502

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