JLSEC-2026-435

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-435.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-435.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-435

Upstream

CVE-2025-9086

EUVD-2025-29014

GHSA-v676-f8gm-92r9

Published

2026-05-04T13:12:06.605Z

Modified

2026-05-04T13:32:46.303908931Z

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

1. A cookie is set using the `secure` keyword for `https://target` 2. curl is redirected to or...

Details

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.
3. 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

{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "published": "2025-09-12T06:15:44.100Z",
            "id": "CVE-2025-9086",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-9086",
            "imported": "2026-05-02T08:39:49.596Z",
            "modified": "2026-01-20T14:58:01.347Z",
            "database_specific": {
                "status": "Analyzed"
            },
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9086"
        },
        {
            "published": "2025-09-12T06:30:26Z",
            "url": "https://api.github.com/advisories/GHSA-v676-f8gm-92r9",
            "imported": "2026-05-02T08:42:47.018Z",
            "html_url": "https://github.com/advisories/GHSA-v676-f8gm-92r9",
            "id": "GHSA-v676-f8gm-92r9",
            "modified": "2026-01-20T15:31:21Z"
        },
        {
            "published": "2025-09-12T05:10:03Z",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2025-29014",
            "imported": "2026-05-02T08:41:27.977Z",
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-29014",
            "id": "EUVD-2025-29014",
            "modified": "2026-01-08T09:51:46Z"
        }
    ]
}

References

Affected packages

Julia / CURL_jll

Package

Name: CURL_jll
Purl: pkg:julia/CURL_jll?uuid=b21e61f3-bafc-59ac-ab14-4c5c62d6588d

Affected ranges

Type: SEMVER
Events: Introduced

8.13.0+0

Fixed

8.16.0+0

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-435.json"

Julia / LibCURL_jll

Package

Name: LibCURL_jll
Purl: pkg:julia/LibCURL_jll?uuid=deac9b47-8bc7-5906-a0fe-35ac56dc84c0

Affected ranges

Type: SEMVER
Events: Introduced

8.13.0+0

Fixed

8.16.0+0

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-435.json"