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CVE-2026-115710

Use of Cache Containing Sensitive Information in Elasticsearch Leading to Information Disclosure

Products / packages Elasticsearch

Published

Share

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 02:25:31 UTC
elastic · CVSS:3.1 · 4.2
Assessment vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Severity

medium4.2

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

Elasticsearch versions 8.9.0 to 8.19.23, 9.0.0 to 9.4.8, and 9.5.0 to 9.5.5 have a weakness where cached query results can be shared between users, potentially leading to information disclosure. A restricted user can learn sensitive information or cause incomplete search results for users with full access. Disclosure requires a user with full access to have recently run the same query on the same shard.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Elastic · elastic

Elasticsearch

3 ranges
elastic version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

8.9.0 → through 8.19.23

semver versions

9.0.0 → through 9.4.8

semver versions

9.5.0 → through 9.5.5

semver versions

unaffected

unknown

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Use of Cache Containing Sensitive Information (CWE-524) in Elasticsearch can lead to information disclosure and incorrect search results via specially crafted search requests. For some query types, Elasticsearch can share cached query results between users who have field-level security restrictions and users who do not. A user restricted by field-level security can learn which documents match a value in a field that they cannot read. A restricted user can also cause users with full access to receive incomplete search results. Disclosure is only possible when a user with full access ran the same query on the same shard recently.

References

1 sources
discuss.elastic.co/t/elasticsearch-8-19-24-9-4-9-9-5-6-security-update-esa-2026-210/391363
Security advisoryelastic

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-115710

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-524 ↗

CWE-524 Use of Cache Containing Sensitive Information

elastic

Related →
Contributing organizations · 2
elastic

Assigning organization

2026-11-03
CISA-ADP

Additional data publisher

2026-11-03

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-115710

    Observed 2026-11-03T17:37:16.842Z · upstream updated 2026-11-03T17:30:13.952Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-03T17:30:03.351642Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.