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Back to active CVEs
Medium · CVSS 6.5CVE-2026-88858

Server-side expression parser denial of serviceCVE-2026-88858

Answer in brief

CVE-2026-88858 records a Medium severity (CVSS 6.5) vulnerability in Server-side expression parser denial of service. The current sources do not mark it as known exploited. The current feed maps Grafana/Grafana Enterprise (generic), Grafana/Grafana OSS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 28, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Grafana/Grafana Enterprise (generic), Grafana/Grafana OSS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Grafana/Grafana Enterprisegeneric>=7.4.0 <=11.6.16 || >=12.0.0 <=12.2.10 || >=12.3.0 <=12.3.11 || >=12.4.0 <=12.4.13 || >=13.0.0 <=13.0.11 || >=13.1.0 <=13.1.8 || >=13.2.0 <=13.2.4Not reported
Grafana/Grafana OSSgeneric>=7.4.0 <=11.6.16 || >=12.0.0 <=12.2.10 || >=12.3.0 <=12.3.11 || >=12.4.0 <=12.4.13 || >=13.0.0 <=13.0.11 || >=13.1.0 <=13.1.8 || >=13.2.0 <=13.2.4Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Grafana/Grafana Enterprise, Grafana/Grafana OSS.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 28, 2026

Sources and claim methodology

  • Source referencegrafana.com
Upstream source description

A user with the Viewer role in Grafana can crash the server by submitting a crafted server-side math expression (uncontrolled recursion). A user with permission to provision alert rules can make the outage persist across restarts.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • OAuth and OIDC tokens written unredacted to server logs by the Generic OAuth, Google and GitLab connectorsSame grafana/grafana enterprise package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-674, CWE-20, CWE-400
Source
CVE List V5
Source checked
Oct 28, 2026
References
1 linked source
Open source record