CVE-2026-8924 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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References

Link	Providers
https://curl.se/docs/CVE-2026-8924.html
https://curl.se/docs/CVE-2026-8924.json
https://hackerone.com/reports/3733905

History

Fri, 03 Jul 2026 06:45:00 +0000

Type	Values Removed	Values Added
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.
Title		trailing dot domain super cookie
References		https://curl.se/docs/CVE-2026-8924.html https://curl.se/docs/CVE-2026-8924.json https://hackerone.com/reports/3733905

MITRE

Status: PUBLISHED

Assigner: curl

Published: 2026-07-03T06:15:04.646Z

Updated: 2026-07-03T06:15:04.646Z

Reserved: 2026-05-19T08:11:35.441Z

Link: CVE-2026-8924

Vulnrichment

No data.

NVD

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Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8924", "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9", "state": "PUBLISHED", "assignerShortName": "curl", "dateReserved": "2026-05-19T08:11:35.441Z", "datePublished": "2026-07-03T06:15:04.646Z", "dateUpdated": "2026-07-03T06:15:04.646Z"}, "containers": {"cna": {"title": "trailing dot domain super cookie", "descriptions": [{"lang": "en", "value": "A flaw in curl\u2019s 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."}], "providerMetadata": {"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9", "shortName": "curl", "dateUpdated": "2026-07-03T06:15:04.646Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-201 Information Exposure Through Sent Data"}]}], "affected": [{"vendor": "curl", "product": "curl", "versions": [{"version": "8.20.0", "status": "affected", "lessThanOrEqual": "8.20.0", "versionType": "semver"}, {"version": "8.19.0", "status": "affected", "lessThanOrEqual": "8.19.0", "versionType": "semver"}, {"version": "8.18.0", "status": "affected", "lessThanOrEqual": "8.18.0", "versionType": "semver"}, {"version": "8.17.0", "status": "affected", "lessThanOrEqual": "8.17.0", "versionType": "semver"}, {"version": "8.16.0", "status": "affected", "lessThanOrEqual": "8.16.0", "versionType": "semver"}, {"version": "8.15.0", "status": 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"json"}, {"url": "https://curl.se/docs/CVE-2026-8924.html", "name": "www"}, {"url": "https://hackerone.com/reports/3733905", "name": "issue"}], "credits": [{"lang": "en", "value": "vegagent on hackerone", "type": "finder"}, {"lang": "en", "value": "Daniel Stenberg", "type": "remediation developer"}]}}}