---
id: "CVE-2026-116671"
kind: "vulnerability"
aliases: ["CVE-2026-116671"]
title: "Xpdf: crafted JPEG 2000 image makes PDF viewer hang forever"
severity: "low"
cvss: 2.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "pdf", "self-hosted", "xpdf"]
not_affected_if: ["untrusted-pdfs-not-processed", "xpdf-not-installed"]
published_at: "2026-10-26T21:18:17+00:00"
first_seen_at: "2026-10-26T21:20:32+00:00"
updated_at: "2026-10-26T21:21:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116671", "first_seen_at": "2026-10-26T21:20:32+00:00"}]
---

# Xpdf: crafted JPEG 2000 image makes PDF viewer hang forever

Xpdf 4.06 and earlier loop forever when parsing a JPEG 2000 image with a bad progression order field. An attacker who gets a user to open a crafted PDF can freeze the viewer or a service that renders PDFs.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `xpdf -v` or check the installed Xpdf version and compare it with `4.06`
- Check whether your Linux distribution's `xpdf` package is listed in the advisory as affected: unknown

## Fix

- Move to a fixed Xpdf release newer than `4.06`: unknown (the sources do not name the fixed version)
- Until patched, avoid opening untrusted PDFs in Xpdf or any service that uses it for conversion: unknown

## Timeline

- 2026-10-26T21:20:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116671

## From the sources

Infinite loop in Xpdf 4.06 and earlier, due to incorrect validation of progression order field in JPEG 2000 image.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_