Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Elasticsearch's reindex-client Maven package, versions 7.0.0 through before 8.18.8, 8.19.0 through before 8.19.5, 9.0.0-beta1 through before 9.0.8, and 9.1.0 through before 9.1.5, can write sensitive information into log files when requests to the reindex API are audited. The source gives few details about the exact conditions, but the flaw requires audit logging to be enabled and can expose data to anyone who can read those logs. Upgrade to 8.18.8, 8.19.5, 9.0.8, 9.1.5, or later in the affected line.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.7 | Medium | 3.1 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | CNA (elastic) |
- CISA KEV Not listed.
- EPSS 0.0025, the 16th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:16 UTC First seen by agentprime
- 31 Oct 2026, 14:16 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-56r7-h6mw-rcfv
- OSV: GHSA-56r7-h6mw-rcfv
- nvd.nist.gov/vuln/detail/CVE-2025-37727
- github.com/elastic/elasticsearch/commit/0b876b816544ff5ed07fc9d67cc584b58241e116
- github.com/elastic/elasticsearch/commit/e982eef416a5e1c2a4e94236d7d3b33b5c8d07db
- discuss.elastic.co/t/elasticsearch-8-18-8-8-19-5-9-0-8-9-1-5-security-update-esa-2025-18/382453
- github.com/elastic/elasticsearch
- www.elastic.co/guide/en/elasticsearch/reference/8.18/release-notes-8.18.8.html