CVE-2025-9086

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Source
https://cve.org/CVERecord?id=CVE-2025-9086
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-9086.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-9086
Aliases
Downstream
Related
Published
2025-09-12T05:10:03.815Z
Modified
2026-05-18T05:58:24.619702725Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Out of bounds read for cookie path
Details
  1. A cookie is set using the secure keyword for https://target
    1. curl is redirected to or otherwise made to speak with http://target (same hostname, but using clear text HTTP) using the same cookie set
    2. The same cookie name is set - but with just a slash as path (path=\"/\",). Since this site is not secure, the cookie should just be ignored.
  2. 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.

Database specific 
{
    "cna_assigner": "curl",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9086.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "8.15.0"
                },
                {
                    "last_affected": "8.14.1"
                },
                {
                    "last_affected": "8.14.0"
                },
                {
                    "last_affected": "8.13.0"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
1c3149881769e7bd79b072e48374e4c2b3678b2f
Fixed
11b991232fbcaa88e2b1faecac224416b0001e35
Database specific 
{
    "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "8.13.0"
        },
        {
            "fixed": "8.16.0"
        }
    ]
}

Affected versions

Other
curl-8_13_0
curl-8_14_0
curl-8_14_1
curl-8_15_0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-9086.json"