cbcvebase.
CVE-2025-9086
published 2025-09-12

CVE-2025-9086: 1. A cookie is set using the `secure` keyword for `https://target` 2. curl is redirected to or otherwise made to speak with `http://target` (same hostname, but…

PriorityP340high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.40%
71.3th percentile
1. A cookie is set using the `secure` keyword for `https://target` 2. curl is redirected to or otherwise made to speak with `http://target` (same hostname, but using clear text HTTP) using the same cookie set 3. The same cookie name is set - but with only a slash as path (`path="/"`). Since this site is not secure, the cookie *should* be ignored. 4. A bug in the path comparison logic makes curl read outside a heap buffer boundary The bug either causes a crash or it potentially makes the comparison come to the wrong conclusion and lets the clear-text site override the contents of the secure cookie, contrary to expectations and depending on the memory contents immediately following the single-byte allocation that holds the path. The presumed and correct behavior would be to plainly ignore the second set of the cookie since it was already set as secure on a secure host so overriding it on an insecure host should not be okay.

Affected

52 ranges· showing 25
VendorProductVersion rangeFixed in
appleios_18.7.3_and_ipados——
appleios_26.2_and_ipados——
applemacos_sequoia——
applemacos_sonoma——
applemacos_tahoe——
appletvos——
applevisionos——
applewatchos——
curlcurl——
curlcurl——
curlcurl——
curlcurl——
curlcurl>= 1aea05a6c2699e80c75936d58569851555acd603 < c6ae07c6a541e0e96d0040afb62b45dd37711300c6ae07c6a541e0e96d0040afb62b45dd37711300
curlcurl>= 8.13.0 < 8.14.28.14.2
curlcurl>= 8.15.0 < 8.16.08.16.0
debiancurl< curl 8.16.0~rc2-1 (forky)curl 8.16.0~rc2-1 (forky)
debiandebian_linux——
haxxcurl>= 0 < 8.14.1-r28.14.1-r2
haxxcurl>= 0 < 8.14.1-r28.14.1-r2
haxxcurl>= 0 < 8.14.1-r28.14.1-r2
haxxcurl>= 0 < 8.14.1-r28.14.1-r2
haxxcurl>= 0 < 8.16.0-r08.16.0-r0
haxxcurl>= 0 < 8.14.1-2+deb13u18.14.1-2+deb13u1
haxxcurl>= 0 < 8.16.0~rc2-18.16.0~rc2-1
haxxcurl>= 0 < 7.81.0-1ubuntu1.227.81.0-1ubuntu1.22

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_debian7.5LOW
vendor_oracle7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu5.3MEDIUM
vendor_msrc4.3MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.