Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

published 2026-11-03 6 d ago modified 2026-11-03 5 d ago also EUVD-2026-116072

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-115290 updated 2026-11-06 cvss 7.5

elasticsearch: elasticsearch: Denial of Service via deeply nested serialized payloads

Red Hat OpenShift AI (RHOAI) rhoai/odh-feature-server-rhel9
affected: workaround, no fix available
Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 5 d ago (2026-11-03)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Elastic Elasticsearch

Classification

Weakness

CWE-674 Uncontrolled Recursion

References

discuss.elastic.co /t/elasticsearch-8-19-24-9-4-9-9-5-6-security-update-esa-2026-201/391356

Sources

CVE List CVE-2026-115290
NVD CVE-2026-115290

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary