---
id: CVE-2026-55891
title: >-
  PrivateBin is an online pastebin where the server has zero knowledge of pasted
  data
summary: >-
  PrivateBin is an online pastebin where the server has zero knowledge of pasted
  data. Prior to 2.0.5, Request::getRequestUri() in lib/Request.php passes
  $_SERVER['REQUEST_URI'] through FILTER_SANITIZE_URL, which does not remove
  quotation …
severity: low
cvss: 0
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N'
cwe:
  - CWE-116
vendor: privatebin
product: privatebin/privatebin
affected:
  - privatebin/privatebin <= 2.0.4
patched:
  - privatebin/privatebin 2.0.5
published: '2026-08-28'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55891'
references:
  - url: >-
      https://github.com/PrivateBin/PrivateBin/commit/164c839c39688533ef0086575878e8392cd21249
    label: security-advisories@github.com
  - url: 'https://github.com/PrivateBin/PrivateBin/releases/tag/2.0.5'
    label: security-advisories@github.com
  - url: >-
      https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-xrjc-c68j-hp7w
    label: security-advisories@github.com
  - url: >-
      https://github.com/PrivateBin/PrivateBin/security/advisories/GHSA-xrjc-c68j-hp7w
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://github.com/PrivateBin/PrivateBin/commit/75f056dcda955d94c17ec5a4f8c54a9b7bfcee07
  - url: 'https://github.com/advisories/GHSA-xrjc-c68j-hp7w'
tags:
  - nvd
  - ghsa
  - composer
epss: 0.00539
epssPercentile: 0.43075
aliases:
  - GHSA-xrjc-c68j-hp7w
ecosystem: composer
ingestedAt: '2026-08-28T21:25:40.638Z'
---

## Overview

PrivateBin is an online pastebin where the server has zero knowledge of pasted data. Prior to 2.0.5, Request::getRequestUri() in lib/Request.php passes $_SERVER['REQUEST_URI'] through FILTER_SANITIZE_URL, which does not remove quotation marks, angle brackets, or apostrophes, and Controller::_init() stores the attacker-controlled value in Controller::$_urlBase. Controller::_jsonld() in lib/Controller.php then uses str_replace() to insert that value without JSON escaping into js/types.jsonld, js/paste.jsonld, and the other JSON-LD templates used by /?jsonld= and /?pasteid. A raw quotation mark delivered by an HTTP client, proxy, or structured-data crawler that does not normalize the request target can break out of the JSON string and inject arbitrary key-value data into a CORS-open application/ld+json response. The jsonld branch in Controller::__construct() returns before _setCacheHeaders(), so the response also lacks X-Content-Type-Options: nosniff, Content Security Policy, X-Frame-Options, and Referrer-Policy. Direct script execution was not demonstrated, but manipulated responses can affect structured-data consumers or combine with less strict clients. This issue is fixed in version 2.0.5.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55891)

Affected packages:

- `privatebin/privatebin <= 2.0.4`

Patched in:

- `privatebin/privatebin 2.0.5`

Source: https://github.com/advisories/GHSA-xrjc-c68j-hp7w