8.8

CVE-2026-83497: amazon amazon opensearch service Deserialization of Untrusted Data

CVSS: 8.8v3.1HighAwaiting analysis
Published 31-08-2026Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2026-83497 is a high (CVSS 8.8) Deserialization of Untrusted Data vulnerability in amazon amazon opensearch service. EPSS estimates a 0.96% chance of exploitation in the next 30 days, higher than 60.9% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.96%
0%100%
Low · +0.44 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-08-2026
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    Last modifiedVulnerability information updated.

Description

Unrestricted deserialization of untrusted data in the cursor pagination component in the OpenSearch SQL plugin allows a remote authenticated user with basic read/search permissions to execute arbitrary code on the server by sending a crafted cursor parameter to the plugins/sql endpoint.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.96%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

+0.44 pp

From 0.52% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.96%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Amazon1 product
Opensearch1 product

2 vendors · 2 products

References

3 links