cve-2026-8924
CRITICAL CVSS 9.1 nvd
Description
A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set "super cookies" that bypass the Public Suffix List check. This enables an attacker-controlled origin to inject cookies that curl subsequently scopes and transmits to unrelated third-party domains.
Timeline
- Published
- 2026-07-03
- Last Modified
- 2026-09-15
CVSS Details
- Attack Vector
- NETWORK
- Attack Complexity
- LOW
- Privileges Required
- NONE
Affected Products
- haxx curl
Weaknesses (CWE)
CVSS metrics
| Version | Base | Severity | Vector | Exploitability | Impact | Source |
|---|---|---|---|---|---|---|
| 3.1 | 9.1 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
3.9 | 5.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
CPE configurations
OR
| CPE | Version range | Vulnerable |
|---|---|---|
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* |
>= 7.46.0, < 8.21.0 | yes |
NVD metadata
- NVD status
- Modified
- Source identifier
2499f714-1537-4658-8207-48ae4bb9eae9
References
- https://curl.se/docs/CVE-2026-8924.html Patch, Vendor Advisory
- https://curl.se/docs/CVE-2026-8924.json Vendor Advisory
- https://hackerone.com/reports/3733905 Exploit, Issue Tracking, Third Party Advisory
Linked Vulnerabilities
{
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"datePublished": "2026-07-03T07:16:24.793",
"dateUpdated": "2026-09-15T07:16:32.573",
"description": "A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set\n\"super cookies\" that bypass the Public Suffix List check. This enables an\nattacker-controlled origin to inject cookies that curl subsequently scopes and\ntransmits to unrelated third-party domains.",
"id": "CVE-2026-8924",
"raw": {
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"title": "A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set\n\"super cookies\" that bypass the Public ..."
}
Enrichment data
Aggregated bundle (all enrichments)