# CVE-2017-11626: Denial of service in n/a

> Attackers can cause a denial of service in applications using the QPDF library by providing a crafted file that triggers an infinite loop.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 25 Jul 2017
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2017-11626, DEBIAN-CVE-2017-11626, GHSA-3wr5-mp77-p74f, UBUNTU-CVE-2017-11626

## What is CVE-2017-11626?

CVE-2017-11626 is a medium-severity denial of service vulnerability in n/a, published on 25 Jul 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A stack-consumption vulnerability was found in libqpdf in QPDF 6.0.0, which allows attackers to cause a denial of service via a crafted file, related to the QPDFTokenizer::resolveLiteral function in QPDFTokenizer.cc after four consecutive calls to QPDFObjectHandle::parseInternal, aka an "infinite loop."

Weakness: CWE-835 (Loop with Unreachable Exit Condition)

## Which versions are affected by CVE-2017-11626?

It affects 1 product.


Products: Qpdf Project Qpdf.

## How do I fix CVE-2017-11626?

Upgrade to a fixed version.

## Is CVE-2017-11626 being exploited?

There is no known exploitation of CVE-2017-11626 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-12595](https://insights.sbomify.com/CVE-2017-12595/): Denial of service in n/a (high 7.8)
- [CVE-2022-34503](https://insights.sbomify.com/CVE-2022-34503/): Memory corruption in n/a (medium 6.5)
- [CVE-2021-36978](https://insights.sbomify.com/CVE-2021-36978/): Memory corruption in n/a (medium 5.5)
- [CVE-2015-9252](https://insights.sbomify.com/CVE-2015-9252/): Denial of service in n/a (medium 5.5)
- [CVE-2017-18183](https://insights.sbomify.com/CVE-2017-18183/): Denial of service in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-11626 and fix it if it is affected.

What it is: CVE-2017-11626 is a medium-severity denial of service vulnerability in n/a, published on 25 Jul 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2017-11626 in the wild and no public exploit code.

Affected product: n/a. 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-2017-11626/ (Markdown: https://insights.sbomify.com/CVE-2017-11626/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-11626
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-11626
- OSV: https://osv.dev/vulnerability/CVE-2017-11626

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-11626/
Summaries are generated and may contain mistakes; the official description above is the record.