# CVE-2026-20300: Cisco Identity Services Engine SQL Injection Vulnerability

> Authenticated attackers with low-privileged admin credentials can perform SQL injection to read or modify database data in Cisco ISE.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Sep 2026
- **Updated:** 18 Sep 2026
- **Also known as:** GHSA-j6jc-3rmg-h4f7

## What is CVE-2026-20300?

CVE-2026-20300 is a high-severity SQL injection vulnerability in Cisco Identity Services Engine Software, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in Cisco ISE could allow an authenticated, remote attacker to conduct SQL injection attacks on an affected device. To exploit this vulnerability, the attacker must have at least low-privileged administrative credentials.

This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to read or modify data in the underlying database.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2026-20300?


## How do I fix CVE-2026-20300?

No fix has been published for CVE-2026-20300 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20300 being exploited?

There is no known exploitation of CVE-2026-20300 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20300 and fix it if it is affected.

What it is: CVE-2026-20300 is a high-severity SQL injection vulnerability in Cisco Identity Services Engine Software, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-20300 in the wild and no public exploit code.

Affected product: Cisco Identity Services Engine Software. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-20300/ (Markdown: https://insights.sbomify.com/CVE-2026-20300/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20300
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20300
- OSV: https://osv.dev/vulnerability/CVE-2026-20300

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-20300/
Summaries are generated and may contain mistakes; the official description above is the record.