# CVE-2026-77488: Microsoft SQL Server Information Disclosure Vulnerability

> An authorized local attacker can exploit an integer underflow in Microsoft SQL Server to disclose sensitive information.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Sep 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-2p2q-6jp7-fc7g

## What is CVE-2026-77488?

CVE-2026-77488 is a medium-severity vulnerability in Microsoft Sql Server 2017, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Integer underflow (wrap or wraparound) in SQL Server allows an authorized attacker to disclose information locally.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2026-77488?

It affects 4 products.


Products: Microsoft Sql Server 2017, Microsoft Sql Server 2019, Microsoft Sql Server 2022, Microsoft Sql Server 2025.

## How do I fix CVE-2026-77488?

No fix has been published for CVE-2026-77488 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-77488 being exploited?

There is no known exploitation of CVE-2026-77488 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Sql Server 2017

- [CVE-2026-67631](https://insights.sbomify.com/CVE-2026-67631/): Microsoft SQL Server Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2026-66814](https://insights.sbomify.com/CVE-2026-66814/): Microsoft SQL Server Elevation of Privilege Vulnerability (high 8.8)
- [CVE-2026-66818](https://insights.sbomify.com/CVE-2026-66818/): Microsoft SQL Server Elevation of Privilege Vulnerability (high 8.8)
- [CVE-2026-66819](https://insights.sbomify.com/CVE-2026-66819/): Microsoft SQL Server Elevation of Privilege Vulnerability (high 8.8)
- [CVE-2026-66820](https://insights.sbomify.com/CVE-2026-66820/): SQL Server Elevation of Privilege Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-77488 and fix it if it is affected.

What it is: CVE-2026-77488 is a medium-severity vulnerability in Microsoft Sql Server 2017, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-77488 in the wild and no public exploit code.

Affected product: Microsoft Sql Server 2017. 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-2026-77488/ (Markdown: https://insights.sbomify.com/CVE-2026-77488/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-77488
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77488
- OSV: https://osv.dev/vulnerability/CVE-2026-77488

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-77488/
Summaries are generated and may contain mistakes; the official description above is the record.