CVE-2026-8924 - Vulnerability Details

- trailing dot domain super cookie

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.

Published: 2026-07-03

Score: n/a

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

curl

unaffected

Version	Status	Constraints
`8.20.0`	affected	≤ 8.20.0
`8.19.0`	affected	≤ 8.19.0
`8.18.0`	affected	≤ 8.18.0
`8.17.0`	affected	≤ 8.17.0
`8.16.0`	affected	≤ 8.16.0
`8.15.0`	affected	≤ 8.15.0
`8.14.1`	affected	≤ 8.14.1
`8.14.0`	affected	≤ 8.14.0
`8.13.0`	affected	≤ 8.13.0
`8.12.1`	affected	≤ 8.12.1
`8.12.0`	affected	≤ 8.12.0
`8.11.1`	affected	≤ 8.11.1
`8.11.0`	affected	≤ 8.11.0
`8.10.1`	affected	≤ 8.10.1
`8.10.0`	affected	≤ 8.10.0
`8.9.1`	affected	≤ 8.9.1
`8.9.0`	affected	≤ 8.9.0
`8.8.0`	affected	≤ 8.8.0
`8.7.1`	affected	≤ 8.7.1
`8.7.0`	affected	≤ 8.7.0
`8.6.0`	affected	≤ 8.6.0
`8.5.0`	affected	≤ 8.5.0
`8.4.0`	affected	≤ 8.4.0
`8.3.0`	affected	≤ 8.3.0
`8.2.1`	affected	≤ 8.2.1
`8.2.0`	affected	≤ 8.2.0
`8.1.2`	affected	≤ 8.1.2
`8.1.1`	affected	≤ 8.1.1
`8.1.0`	affected	≤ 8.1.0
`8.0.1`	affected	≤ 8.0.1
`8.0.0`	affected	≤ 8.0.0
`7.88.1`	affected	≤ 7.88.1
`7.88.0`	affected	≤ 7.88.0
`7.87.0`	affected	≤ 7.87.0
`7.86.0`	affected	≤ 7.86.0
`7.85.0`	affected	≤ 7.85.0
`7.84.0`	affected	≤ 7.84.0
`7.83.1`	affected	≤ 7.83.1
`7.83.0`	affected	≤ 7.83.0
`7.82.0`	affected	≤ 7.82.0
`7.81.0`	affected	≤ 7.81.0
`7.80.0`	affected	≤ 7.80.0
`7.79.1`	affected	≤ 7.79.1
`7.79.0`	affected	≤ 7.79.0
`7.78.0`	affected	≤ 7.78.0
`7.77.0`	affected	≤ 7.77.0
`7.76.1`	affected	≤ 7.76.1
`7.76.0`	affected	≤ 7.76.0
`7.75.0`	affected	≤ 7.75.0
`7.74.0`	affected	≤ 7.74.0
`7.73.0`	affected	≤ 7.73.0
`7.72.0`	affected	≤ 7.72.0
`7.71.1`	affected	≤ 7.71.1
`7.71.0`	affected	≤ 7.71.0
`7.70.0`	affected	≤ 7.70.0
`7.69.1`	affected	≤ 7.69.1
`7.69.0`	affected	≤ 7.69.0
`7.68.0`	affected	≤ 7.68.0
`7.67.0`	affected	≤ 7.67.0
`7.66.0`	affected	≤ 7.66.0
`7.65.3`	affected	≤ 7.65.3
`7.65.2`	affected	≤ 7.65.2
`7.65.1`	affected	≤ 7.65.1
`7.65.0`	affected	≤ 7.65.0
`7.64.1`	affected	≤ 7.64.1
`7.64.0`	affected	≤ 7.64.0
`7.63.0`	affected	≤ 7.63.0
`7.62.0`	affected	≤ 7.62.0
`7.61.1`	affected	≤ 7.61.1
`7.61.0`	affected	≤ 7.61.0
`7.60.0`	affected	≤ 7.60.0
`7.59.0`	affected	≤ 7.59.0
`7.58.0`	affected	≤ 7.58.0
`7.57.0`	affected	≤ 7.57.0
`7.56.1`	affected	≤ 7.56.1
`7.56.0`	affected	≤ 7.56.0
`7.55.1`	affected	≤ 7.55.1
`7.55.0`	affected	≤ 7.55.0
`7.54.1`	affected	≤ 7.54.1
`7.54.0`	affected	≤ 7.54.0
`7.53.1`	affected	≤ 7.53.1
`7.53.0`	affected	≤ 7.53.0
`7.52.1`	affected	≤ 7.52.1
`7.52.0`	affected	≤ 7.52.0
`7.51.0`	affected	≤ 7.51.0
`7.50.3`	affected	≤ 7.50.3
`7.50.2`	affected	≤ 7.50.2
`7.50.1`	affected	≤ 7.50.1
`7.50.0`	affected	≤ 7.50.0
`7.49.1`	affected	≤ 7.49.1
`7.49.0`	affected	≤ 7.49.0
`7.48.0`	affected	≤ 7.48.0
`7.47.1`	affected	≤ 7.47.1
`7.47.0`	affected	≤ 7.47.0
`7.46.0`	affected	≤ 7.46.0

No data.

Vendor Product Confidence Versions

Curl

100%

Version	Status	Scheme	Platform
`[8.20.0,8.20.0]`	affected	semver	—
`[8.19.0,8.19.0]`	affected	semver	—
`[8.18.0,8.18.0]`	affected	semver	—
`[8.17.0,8.17.0]`	affected	semver	—
`[8.16.0,8.16.0]`	affected	semver	—
`[8.15.0,8.15.0]`	affected	semver	—
`[8.14.1,8.14.1]`	affected	semver	—
`[8.14.0,8.14.0]`	affected	semver	—
`[8.13.0,8.13.0]`	affected	semver	—
`[8.12.1,8.12.1]`	affected	semver	—
`[8.12.0,8.12.0]`	affected	semver	—
`[8.11.1,8.11.1]`	affected	semver	—
`[8.11.0,8.11.0]`	affected	semver	—
`[8.10.1,8.10.1]`	affected	semver	—
`[8.10.0,8.10.0]`	affected	semver	—
`[8.9.1,8.9.1]`	affected	semver	—
`[8.9.0,8.9.0]`	affected	semver	—
`[8.8.0,8.8.0]`	affected	semver	—
`[8.7.1,8.7.1]`	affected	semver	—
`[8.7.0,8.7.0]`	affected	semver	—
`[8.6.0,8.6.0]`	affected	semver	—
`[8.5.0,8.5.0]`	affected	semver	—
`[8.4.0,8.4.0]`	affected	semver	—
`[8.3.0,8.3.0]`	affected	semver	—
`[8.2.1,8.2.1]`	affected	semver	—
`[8.2.0,8.2.0]`	affected	semver	—
`[8.1.2,8.1.2]`	affected	semver	—
`[8.1.1,8.1.1]`	affected	semver	—
`[8.1.0,8.1.0]`	affected	semver	—
`[8.0.1,8.0.1]`	affected	semver	—
`[8.0.0,8.0.0]`	affected	semver	—
`[7.88.1,7.88.1]`	affected	semver	—
`[7.88.0,7.88.0]`	affected	semver	—
`[7.87.0,7.87.0]`	affected	semver	—
`[7.86.0,7.86.0]`	affected	semver	—
`[7.85.0,7.85.0]`	affected	semver	—
`[7.84.0,7.84.0]`	affected	semver	—
`[7.83.1,7.83.1]`	affected	semver	—
`[7.83.0,7.83.0]`	affected	semver	—
`[7.82.0,7.82.0]`	affected	semver	—
`[7.81.0,7.81.0]`	affected	semver	—
`[7.80.0,7.80.0]`	affected	semver	—
`[7.79.1,7.79.1]`	affected	semver	—
`[7.79.0,7.79.0]`	affected	semver	—
`[7.78.0,7.78.0]`	affected	semver	—
`[7.77.0,7.77.0]`	affected	semver	—
`[7.76.1,7.76.1]`	affected	semver	—
`[7.76.0,7.76.0]`	affected	semver	—
`[7.75.0,7.75.0]`	affected	semver	—
`[7.74.0,7.74.0]`	affected	semver	—
`[7.73.0,7.73.0]`	affected	semver	—
`[7.72.0,7.72.0]`	affected	semver	—
`[7.71.1,7.71.1]`	affected	semver	—
`[7.71.0,7.71.0]`	affected	semver	—
`[7.70.0,7.70.0]`	affected	semver	—
`[7.69.1,7.69.1]`	affected	semver	—
`[7.69.0,7.69.0]`	affected	semver	—
`[7.68.0,7.68.0]`	affected	semver	—
`[7.67.0,7.67.0]`	affected	semver	—
`[7.66.0,7.66.0]`	affected	semver	—
`[7.65.3,7.65.3]`	affected	semver	—
`[7.65.2,7.65.2]`	affected	semver	—
`[7.65.1,7.65.1]`	affected	semver	—
`[7.65.0,7.65.0]`	affected	semver	—
`[7.64.1,7.64.1]`	affected	semver	—
`[7.64.0,7.64.0]`	affected	semver	—
`[7.63.0,7.63.0]`	affected	semver	—
`[7.62.0,7.62.0]`	affected	semver	—
`[7.61.1,7.61.1]`	affected	semver	—
`[7.61.0,7.61.0]`	affected	semver	—
`[7.60.0,7.60.0]`	affected	semver	—
`[7.59.0,7.59.0]`	affected	semver	—
`[7.58.0,7.58.0]`	affected	semver	—
`[7.57.0,7.57.0]`	affected	semver	—
`[7.56.1,7.56.1]`	affected	semver	—
`[7.56.0,7.56.0]`	affected	semver	—
`[7.55.1,7.55.1]`	affected	semver	—
`[7.55.0,7.55.0]`	affected	semver	—
`[7.54.1,7.54.1]`	affected	semver	—
`[7.54.0,7.54.0]`	affected	semver	—
`[7.53.1,7.53.1]`	affected	semver	—
`[7.53.0,7.53.0]`	affected	semver	—
`[7.52.1,7.52.1]`	affected	semver	—
`[7.52.0,7.52.0]`	affected	semver	—
`[7.51.0,7.51.0]`	affected	semver	—
`[7.50.3,7.50.3]`	affected	semver	—
`[7.50.2,7.50.2]`	affected	semver	—
`[7.50.1,7.50.1]`	affected	semver	—
`[7.50.0,7.50.0]`	affected	semver	—
`[7.49.1,7.49.1]`	affected	semver	—
`[7.49.0,7.49.0]`	affected	semver	—
`[7.48.0,7.48.0]`	affected	semver	—
`[7.47.1,7.47.1]`	affected	semver	—
`[7.47.0,7.47.0]`	affected	semver	—
`[7.46.0,7.46.0]`	affected	semver	—

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Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
Ubuntu USN	USN-8487-1	curl vulnerabilities

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.

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

Sat, 04 Jul 2026 01:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-20 CWE-639

Fri, 03 Jul 2026 21:00:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-20 CWE-613

Fri, 03 Jul 2026 13:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-20 CWE-613

Fri, 03 Jul 2026 11:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Curl Curl curl
Vendors & Products		Curl Curl curl

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

Subscriptions

Curl Curl

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

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-07-04T01:15:03Z

Weaknesses

Tracking

Subscriptions

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