CVE-2025-14524 bearer token leak on cross-protocol redirect
Attackers can steal OAuth2 bearer tokens when curl follows cross-protocol redirects to non-HTTP schemes, exposing sensitive credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-14524?
CVE-2025-14524 is a medium-severity vulnerability in Haxx Curl, published on 8 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Which versions are affected by CVE-2025-14524?
It affects 1 product.
Products include Haxx Curl.
How do I fix CVE-2025-14524?
Upgrade to a fixed version.
Is CVE-2025-14524 being exploited?
There is no known exploitation of CVE-2025-14524 in the wild and no public exploit code.
Other vulnerabilities in Haxx Curl
Sources
Also known as ALPINE-CVE-2025-14524, AZL-74192, AZL-74207, BELL-CVE-2025-14524, CLSA-2026-1772443907, CURL-CVE-2025-14524 and 8 more.