CVE-2026-26931 json
Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service
published 7mo ago modified last mo. also EUVD-2026-13139 , GHSA-5vrw-qjxw-89r5 , GO-2026-4790
- cvss
- 5.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
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).
Patch / fix
- go github.com/elastic/beats/v7 7.0.0-alpha2.0.20260112100137-de072c4e371e
- elastic beats 7.0.0-alpha2.0.20260112100137-de072c4e371e, 8.19.13, 9.2.5
- elastic elastic_beats 7.0.0-alpha2.0.20260112100137-de072c4e371e, 8.19.13, 9.2.5
- elastic metricbeat 7.0.0-alpha2.0.20260112100137-de072c4e371e, 8.19.13, 9.2.5
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
Is CVE-2026-26931 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/elastic/beats/v7 | <7.0.0-alpha2.0.20260112100137-de072c4e371e |
7.0.0-alpha2.0.20260112100137-de072c4e371e |
| go | github.com/elastic/beats | all versions |
no fix listed |
Affected products
- Elastic Metricbeat
Classification
- Weakness
-
- CWE-789 Memory Allocation with Excessive Size Value
References
-
github.com
/elastic/beats/commit/de072c4e371eafeb2a42d65b9ad513f666e4ffd7
web, patch
-
discuss.elastic.co
/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532
web, mitigation, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-26931
advisory
-
github.com
/elastic/beats
package
-
github.com
/advisories/GHSA-5vrw-qjxw-89r5
advisory
Sources
- CVE List CVE-2026-26931
- GitHub Advisory GHSA-5vrw-qjxw-89r5
- NVD CVE-2026-26931
- OSV GO-2026-4790
Fencer Intel 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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.