CVE-2026-72686
published 2026-08-13CVE-2026-72686: A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single request containing a crafted user-supplied input. A specific internal…
PriorityP338medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
0.57%
45.3th percentile
A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single request containing a crafted user-supplied input. A specific internal component validates the input using a recursive routine and applies no bound to the length of the value being validated, so the validation causes the thread to exhaust its stack. The resulting fatal error is not handled by the surrounding execution paths and terminates the affected node process, producing a denial of service.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| elastic | elasticsearch | — | — |
| elastic | elasticsearch | >= 8.0.0 < 8.19.20 | 8.19.20 |
| elastic | elasticsearch | 8.0.0 – 8.19.19 | — |
| elastic | elasticsearch | >= 9.0.0 < 9.4.5 | 9.4.5 |
| elastic | elasticsearch | 9.0.0 – 9.4.4 | — |
| elastic | elasticsearch | >= 9.5.0 < 9.5.1 | 9.5.1 |
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GHSA
A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single request containing a crafted user-supplied input.
ghsa_unreviewed·2026-08-13
CVE-2026-72686 [MEDIUM] CWE-674 A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single request containing a crafted user-supplied input.
A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single request containing a crafted user-supplied input. A specific internal component validates the input using a recursive routine and applies no bound to the length of the value being validated, so the validation causes the thread to exhaust its stack. The resulting fatal error is not handled by the surrounding execution paths and terminates the affected node process, producing a denial of service.
VulDB
Elastic Elasticsearch up to 8.19.19/9.4.4/9.5.0 denial of service
vuldb·2026-08-13·CVSS 6.5
CVE-2026-72686 [MEDIUM] Elastic Elasticsearch up to 8.19.19/9.4.4/9.5.0 denial of service
A vulnerability categorized as problematic has been discovered in Elastic Elasticsearch up to 8.19.19/9.4.4/9.5.0. Affected by this issue is some unknown functionality. Such manipulation leads to denial of service.
This vulnerability is uniquely identified as CVE-2026-72686. The attack can be launched remotely. No exploit exists.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-13
Published