# CVE-2017-7407: Information disclosure in n/a

> A heap-based buffer over-read in curl allows physically proximate attackers to read sensitive process memory from the screen when using specific write-out arguments.

- **Severity:** Low 2.4 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 Apr 2017
- **Updated:** 16 Apr 2026
- **Also known as:** ALPINE-CVE-2017-7407, CLEANSTART-2026-ZV09939, CURL-CVE-2017-7407, DEBIAN-CVE-2017-7407, DLA-883-1, GHSA-wc6r-j2hr-524x, UBUNTU-CVE-2017-7407

## What is CVE-2017-7407?

CVE-2017-7407 is a low-severity vulnerability in Haxx Curl, published on 3 Apr 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The ourWriteOut function in tool_writeout.c in curl 7.53.1 might allow physically proximate attackers to obtain sensitive information from process memory in opportunistic circumstances by reading a workstation screen during use of a --write-out argument ending in a '%' character, which leads to a heap-based buffer over-read.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2017-7407?

It affects 1 product.


Products: Haxx Curl.

## How do I fix CVE-2017-7407?

Upgrade to a fixed version.

## Is CVE-2017-7407 being exploited?

There is no known exploitation of CVE-2017-7407 in the wild and no public exploit code.

## Other vulnerabilities in Haxx Curl

- [CVE-2026-19931](https://insights.sbomify.com/CVE-2026-19931/): Negotiate ambient user conn reuse (critical 9.8)
- [CVE-2026-10536](https://insights.sbomify.com/CVE-2026-10536/): HTTP/2 stream-dependency tree UAF (critical 9.8)
- [CVE-2026-11856](https://insights.sbomify.com/CVE-2026-11856/): cross-origin Digest auth state leak (critical 9.8)
- [CVE-2026-8925](https://insights.sbomify.com/CVE-2026-8925/): SASL double-free (critical 9.8)
- [CVE-2026-9079](https://insights.sbomify.com/CVE-2026-9079/): stale proxy password leak (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-7407 and fix it if it is affected.

What it is: CVE-2017-7407 is a low-severity vulnerability in Haxx Curl, published on 3 Apr 2017. 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-2017-7407 in the wild and no public exploit code.

Affected product: Haxx Curl. 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-2017-7407/ (Markdown: https://insights.sbomify.com/CVE-2017-7407/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-7407
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-7407
- OSV: https://osv.dev/vulnerability/CVE-2017-7407

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-7407/
Summaries are generated and may contain mistakes; the official description above is the record.