Medium severity · published Jan 8, 2026
CVE-2025-14524
bearer token leak on cross-protocol redirect
5.3
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CU
curl · curl
7.33.0 before 8.14.2; 8.15.0 before 8.16.1; 8.17.0 before 8.18.0; 06c1bea72faabb6fad4b7ef818aafaa336c9a7aa before 1a822275d333dc6da6043497160fd04c8fa48640; 8.17.0; 8.16.0; +34 more · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-14524
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-14524
Patch
https://curl.se/docs/CVE-2025-14524.html
Vendor Advisory
https://curl.se/docs/CVE-2025-14524.json
Exploit
https://hackerone.com/reports/3459417
Mailing List
http://www.openwall.com/lists/oss-security/2026/01/07/4
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