---
id: CVE-2025-14524
title: |-
  When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer
  performs a cross-protocol redirect to a second URL that uses an IMAP, LDAP,
  POP3 or SMTP scheme, curl might wrongly pass on the bearer token to the new
  target…
summary: |-
  When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer
  performs a cross-protocol redirect to a second URL that uses an IMAP, LDAP,
  POP3 or SMTP scheme, curl might wrongly pass on the bearer token to the new
  target…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N'
cwe:
  - CWE-522
  - CWE-601
vendor: haxx
product: curl
affected:
  - 'curl >= 7.33.0, < 8.18.0'
patched:
  - curl 8.18.0
published: '2026-01-08'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T07:16:24.020'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14524'
references:
  - url: 'https://curl.se/docs/CVE-2025-14524.html'
    label: 2499f714-1537-4658-8207-48ae4bb9eae9
  - url: 'https://curl.se/docs/CVE-2025-14524.json'
    label: 2499f714-1537-4658-8207-48ae4bb9eae9
  - url: 'https://hackerone.com/reports/3459417'
    label: 2499f714-1537-4658-8207-48ae4bb9eae9
  - url: 'http://www.openwall.com/lists/oss-security/2026/01/07/4'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-01-09T19:24:54.231955Z'
epss: 0.00665
epssPercentile: 0.50394
ingestedAt: '2026-09-15T07:33:29.259Z'
---

## Overview

When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer
performs a cross-protocol redirect to a second URL that uses an IMAP, LDAP,
POP3 or SMTP scheme, curl might wrongly pass on the bearer token to the new
target host.

## Affected

- `curl >= 7.33.0, < 8.18.0`

## Remediation

Upgrade past the affected range:

- `curl 8.18.0`