# CVE-2023-46303: Server-side request forgery in n/a

> An attacker can exploit a flaw in Calibre's HTML input plugin to access resources outside the document root, potentially reading sensitive local files.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Oct 2023
- **Updated:** 4 Nov 2025
- **Also known as:** DEBIAN-CVE-2023-46303, GHSA-3j9j-5462-cpx8, UBUNTU-CVE-2023-46303

## What is CVE-2023-46303?

CVE-2023-46303 is a high-severity server-side request forgery vulnerability in n/a, published on 22 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

link_to_local_path in ebooks/conversion/plugins/html_input.py in calibre before 6.19.0 can, by default, add resources outside of the document root.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2023-46303?

It affects 1 product.


Products: Calibre-Ebook Calibre.

## How do I fix CVE-2023-46303?

Upgrade to a fixed version.

## Is CVE-2023-46303 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46303 exists.

## Other vulnerabilities in n/a

- [CVE-2011-4124](https://insights.sbomify.com/CVE-2011-4124/): Command injection in Calibre (critical 9.8)
- [CVE-2011-4125](https://insights.sbomify.com/CVE-2011-4125/): Privilege escalation in Calibre (critical 9.8)
- [CVE-2026-26064](https://insights.sbomify.com/CVE-2026-26064/): calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution (critical 9.3)
- [CVE-2026-26065](https://insights.sbomify.com/CVE-2026-26065/): calibre: Path Traversal can Lead to Arbitrary File Write and Potential Code Execution (critical 9.3)
- [CVE-2026-25635](https://insights.sbomify.com/CVE-2026-25635/): calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-46303 and fix it if it is affected.

What it is: CVE-2023-46303 is a high-severity server-side request forgery vulnerability in n/a, published on 22 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46303 exists.

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-2023-46303/ (Markdown: https://insights.sbomify.com/CVE-2023-46303/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-46303
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-46303
- OSV: https://osv.dev/vulnerability/CVE-2023-46303

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-46303/
Summaries are generated and may contain mistakes; the official description above is the record.