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HIGH

CVE-2020-8184

CVSS v3

7.5

HIGH

EPSS Score

2.9 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • rackRubyGemsfrom 2.2.0 · fixed in 2.2.3

Vendor advisories

  • CVE-2020-8184 Red Hat Product Security1,251 products fixed · 8 known affected

    rubygem-rack: percent-encoded cookies can be used to overwrite existing prefixed cookie names

    cfme-amazon-smartstate as a component of CloudForms Management Engine 5 · cfme-amazon-smartstate.src as a component of CloudForms Management Engine 5 · cfme-gemset as a component of CloudForms Management Engine 5

  • RHSA-2020:4366 Red Hat Product Security1,251 products fixed

    Red Hat Security Advisory: Satellite 6.8 release

Full record on NVD

Description

A reliance on cookies without validation/integrity check security vulnerability exists in rack < 2.2.3, rack < 2.1.4 that makes it is possible for an attacker to forge a secure or host-only cookie prefix.

Technical details

Published
2020-06-19

Frequently asked questions

What is CVE-2020-8184?

A reliance on cookies without validation/integrity check security vulnerability exists in rack < 2.2.3, rack < 2.1.4 that makes it is possible for an attacker to forge a secure or host-only cookie prefix.

Is CVE-2020-8184 actively exploited?

Active exploitation of CVE-2020-8184 has not been confirmed. Its EPSS score was 2.9% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8184?

CVE-2020-8184 has a CVSS v3 base score of 7.5 (HIGH severity).

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