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OpenAdvisories
High · 7.5 Public exploit CVE-2026-115290 EUVD-2026-116072GHSA-6f4f-c5j2-2rrx

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

Published Nov 3, 2026 · Updated Nov 3, 2026 · Assigned by elastic

Vendor: Elastic Product: Elasticsearch Package: ruby3.3-elasticsearch Package: ruby3.4-elasticsearch Package: ruby4.0-elasticsearch Ecosystem: Wolfi

Description

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads (CAPEC-230). An unauthenticated attacker with network access to the remote cluster server interface of a node can send a specially crafted request that causes the node to terminate. No credentials are required. The attacker can repeat the request against each reachable node.

Affected products

VendorProductAffectedFixed
Elastic Elasticsearch 8.10.0 – ≤ 8.19.23, 9.0.0 – ≤ 9.4.8, 9.5.0 – ≤ 9.5.5 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling ruby3.3-elasticsearch +2 No fix yet —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • googlesky/CVE-2026-115290 ★ 0 · Nov 5, 2026

    PoC for CVE-2026-115290 (Elasticsearch unauthenticated DoS via the remote cluster server port, CWE-674, ESA-2026-201): validated node kill in a containerized A/B lab (8.19.23 vs 8.19.24)

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

References