---
id: CVE-2002-0687
aliases:
  - GHSA-vwrc-g9q6-f675
  - PYSEC-2026-761
title: Zope Server vulnerable to DoS via header injection
summary: Zope Server vulnerable to DoS via header injection
severity: medium
vendor: zope
product: zope
ecosystem: pip
affected:
  - 'zope >= 2.0.0, < 2.4.4b2'
  - 'zope >= 2.5.0, < 2.5.1b2'
patched:
  - zope 2.4.4b2
  - zope 2.5.1b2
published: '2022-04-30'
updated: '2026-07-06'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-vwrc-g9q6-f675'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2002-0687'
  - url: 'https://marc.info/?l=zope-announce&m=101890177815066&w=2'
  - url: 'https://marc.info/?l=zope-announce&m=101897461507941&w=2'
  - url: 'https://marc.info/?l=zope-announce&m=101897462107967&w=2'
  - url: >-
      https://web.archive.org/web/20020822024423/http://www.iss.net/security_center/static/9621.php
  - url: >-
      https://web.archive.org/web/20021018100409/http://online.securityfocus.com/bid/5813
  - url: 'http://www.redhat.com/support/errata/RHSA-2002-060.html'
  - url: 'http://www.zope.org/Products/Zope/Hotfix_2002-04-15/security_alert'
tags:
  - osv
  - pip
epss: 0.01479
epssPercentile: 0.72327
ingestedAt: '2026-07-08T18:25:53.499Z'
---

## Overview

Zope is a Web application server for Linux. Zope versions 2.0 through 2.5.1 b1 are vulnerable to a denial of service attack, caused by a vulnerability that occurs when using the "through the Web code" capability. A remote attacker could inject malicious headers into a response to cause the vulnerable system to crash.

## Affected packages

- `zope >= 2.0.0, < 2.4.4b2`
- `zope >= 2.5.0, < 2.5.1b2`

## Remediation

Upgrade to a patched release:

- `zope 2.4.4b2`
- `zope 2.5.1b2`