Vulnerability · Published Jan 8, 2026 · Assigned by curl
CVE-2025-14524bearer token leak on cross-protocol redirect
Medium 5.3
In plain English
A medium-severity security flaw in curl from curl. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.7%top 47.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.21 | curl | 8.14.1-r3 | ALPINE-CVE-2025-14524 |
| Alpine:v3.22 | curl | 8.14.1-r4 | ALPINE-CVE-2025-14524 |
| Alpine:v3.23 | curl | 8.18.0-r0 | ALPINE-CVE-2025-14524 |
| Alpine:v3.24 | curl | 8.18.0-r0 | ALPINE-CVE-2025-14524 |
| Debian:12 | curl | 7.88.1-10+deb12u15 | DEBIAN-CVE-2025-14524 |
| Debian:13 | curl | 8.14.1-2+deb13u4 | DEBIAN-CVE-2025-14524 |
| Debian:14 | curl | 8.18.0~rc2-1 | DEBIAN-CVE-2025-14524 |
| Ubuntu:22.04:LTS | curl | 7.81.0-1ubuntu1.22 | USN-8062-1 |
| Ubuntu:22.04:LTS | curl | 7.81.0-1ubuntu1.22 | UBUNTU-CVE-2025-14524 |
| Ubuntu:24.04:LTS | curl | 8.5.0-2ubuntu10.7 | USN-8062-1 |
| Ubuntu:24.04:LTS | curl | 8.5.0-2ubuntu10.7 | UBUNTU-CVE-2025-14524 |
| Ubuntu:25.10 | curl | 8.14.1-2ubuntu1.1 | UBUNTU-CVE-2025-14524 |
| Ubuntu:25.10 | curl | 8.14.1-2ubuntu1.1 | USN-8062-1 |
Affected products (as reported)
Weakness: CWE-522 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N