CVE-2018-16477
CVSS v3
6.5
MEDIUM
EPSS Score
1.3 %
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
- activestorageRubyGemsfrom 5.2.0 · fixed in 5.2.1.1
Vendor advisories
- CVE-2018-16477 Red Hat Product Security
rubygem-activestorage: bypass vulnerability in Google Cloud Storage and Disk services
Description
A bypass vulnerability in Active Storage >= 5.2.0 for Google Cloud Storage and Disk services allow an attacker to modify the `content-disposition` and `content-type` parameters which can be used in with HTML files and have them executed inline. Additionally, if combined with other techniques such as cookie bombing and specially crafted AppCache manifests, an attacker can gain access to private signed URLs within a specific storage path. This vulnerability has been fixed in version 5.2.1.1.
Technical details
- Published
- 2018-11-30
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.