Elastic Metricbeat up to 8.19.12 HTTP remote_write Size memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Elastic Metricbeat up to 8.19.12. This affects the function remote_write of the component HTTP Handler. This manipulation of the argument Size causes memory allocation. This vulnerability appears as CVE-2026-26931. The attacker needs to be present on the local network. There is no available exploit.

Detailsinfo

A vulnerability has been found in Elastic Metricbeat up to 8.19.12 and classified as problematic. Affected by this vulnerability is the function remote_write of the component HTTP Handler. The manipulation of the argument Size with an unknown input leads to a memory allocation vulnerability. The CWE definition for the vulnerability is CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. As an impact it is known to affect availability. The summary by CVE is:

Memory Allocation with Excessive Size Value (CWE-789) in the Prometheus remote_write HTTP handler in Metricbeat can lead Denial of Service via Excessive Allocation (CAPEC-130).

The advisory is shared at discuss.elastic.co. This vulnerability is known as CVE-2026-26931 since 02/16/2026. The exploitation appears to be easy. The attack needs to be initiated within the local network. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-13139). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.7
CNA Vector (elastic): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/16/2026 CVE reserved
03/19/2026 +31 days Advisory disclosed
03/19/2026 +0 days VulDB entry created
03/24/2026 +5 days VulDB entry last update

Sourcesinfo

Advisory: discuss.elastic.co
Status: Confirmed

CVE: CVE-2026-26931 (🔒)
GCVE (CVE): GCVE-0-2026-26931
GCVE (VulDB): GCVE-100-351733
EUVD: 🔒

Entryinfo

Created: 03/19/2026 18:38
Updated: 03/24/2026 01:16
Changes: 03/19/2026 18:38 (64), 03/19/2026 19:35 (1), 03/24/2026 01:16 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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