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.
References (4)
Scores
CVSS v3
5.3
EPSS
0.0003
EPSS Percentile
7.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-601
Status
published
Products (50)
curl/curl
7.33.0
curl/curl
7.34.0
curl/curl
7.35.0
curl/curl
7.36.0
curl/curl
7.37.0
curl/curl
7.37.1
curl/curl
7.38.0
curl/curl
7.39.0
curl/curl
7.40.0
curl/curl
7.41.0
... and 40 more
Published
Jan 08, 2026
Tracked Since
Feb 18, 2026