curl: OAuth2 Bearer Token Leak via Cross-Protocol Redirect
CVE-2025-14524 Published on January 8, 2026

bearer token leak on cross-protocol redirect
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.

NVD

Vulnerability Analysis

CVE-2025-14524 is exploitable with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
NONE
Availability Impact:
NONE

Products Associated with CVE-2025-14524

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Haxx Curl
 
Canonical Ubuntu Linux
 

Affected Versions

curl:

Exploit Probability

EPSS
0.03%
Percentile
8.45%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.