# CVE-2026-90716: marcobambini Gravity Number gravity_parser.c parse_number_expression out-of-bounds

> An out-of-bounds read in the Gravity parser allows remote attackers to cause denial of service or disclose memory contents.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-563x-fw87-x47c

## What is CVE-2026-90716?

CVE-2026-90716 is a medium-severity memory corruption vulnerability in marcobambini Gravity, published on 14 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A vulnerability was detected in marcobambini Gravity up to 0.9.7. This impacts the function parse_number_expression of the file src/compiler/gravity_parser.c of the component Number Parser. Performing a manipulation results in out-of-bounds read. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading to version 0.9.8 will fix this issue. The patch is named 1b9bbf3ad5749e2a3434e6ad073c6e93c24207b6. It is recommended to upgrade the affected component.

Weakness: CWE-125 (Out-of-bounds Read), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-90716?


## How do I fix CVE-2026-90716?

No fix has been published for CVE-2026-90716 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90716 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90716 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90716 and fix it if it is affected.

What it is: CVE-2026-90716 is a medium-severity memory corruption vulnerability in marcobambini Gravity, published on 14 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90716 exists.

Affected product: marcobambini Gravity. 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-2026-90716/ (Markdown: https://insights.sbomify.com/CVE-2026-90716/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90716
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90716
- OSV: https://osv.dev/vulnerability/CVE-2026-90716

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90716/
Summaries are generated and may contain mistakes; the official description above is the record.