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CVE-2026-47848VulnerabilityPublished

Elasticsearch:

Affects elasticsearchSource GCVE Database

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Authoritative record:CVE-2026-47848· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium : upgrade to 9.2.8-r13 when convenient.

Data as of 14 Nov 2026, 02:06 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 9.2.8-r13
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade elasticsearch to 9.2.8-r13.

Affected software

ProductAffectedFixed in
CleanStartelasticsearchpkg:apk/cleanstart/elasticsearch?arch=x86_64Other threatsAffected
  • <9.2.8-r13
Fixed in
  • 9.2.8-r13
CleanStartelasticsearchpkg:apk/cleanstart/elasticsearch?arch=aarch64Other threatsAffected
  • <9.2.8-r13
Fixed in
  • 9.2.8-r13

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and the issue is fixed in elasticsearch version 9.2.8-r13. Users should upgrade to this version or later to remediate the vulnerability.

Description

A security vulnerability in Elasticsearch versions prior to 9.2.8-r13 involves the Reactor Netty WebSocket client potentially leaking credentials during WebSocket handshake redirects to a different origin. This issue has been assigned CVE-2026-47848 and carries a medium severity rating with a CVSS score of 6.1. The vulnerability is fixed in version 9.2.8-r13.

References

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