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CVE-2025-66803

21
FAUCET Score

CVE-2025-66803 describes a race condition in the Hotwired Turbo framework (versions prior to 8.0.x) that allows session cookies to be reapplied after a logout, effectively preventing successful logout operations. This vulnerability, rated Medium severity (CVSS 4.8), can be triggered by remote attackers through selective network delays or by physically proximate attackers. While there is no known active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness and potential future interest.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.0.21CPE matchmatch criteria
cpe:2.3:a:hotwired:turbo:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.24%
Probability of exploitation in next 30 days
EPSS Percentile
15.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0024 is in the 2nd percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: @hotwired/turboFixed in: 8.0.21

Vendor Advisories (1)

npmGHSA-qppm-g56g-fpvplow

Turbo Frame responses can restore stale session cookies

Jan 20, 2026

References

github.com / hotwired/turbo/pull/1399
ExploitIssue TrackingPatch
github.com / hotwired/turbo/security/advisories/GHSA-qppm-g56g-fpvp
Vendor Advisory
turbo.hotwired.dev / handbook/frames
Product