CVE-2021-44528
actionpack Open Redirect in Host Authorization Middleware
Record from NVD · Published December 14, 2021
actionpack is fixed in 6.1.4.2, 6.1.4.1, 6.0.4.2 and 1 more (RubyGems)
A open redirect vulnerability exists in Action Pack >= 6.0.0 that could allow an attacker to craft a "X-Forwarded-Host" headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.
EPSS 4.42% · 91.4th percentile
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| actionpack | RubyGems | 6.1.4.2, 6.1.4.1, 6.0.4.2, 6.0.4.1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| rubyonrails | rails | 6.0.4.2, 7.0.0, 6.1.4.2 |
Timeline
- Dec 14, 2021 CVE Published
- Jan 8, 2022 EPSS Score (30 in total, the first dated here)
- Jan 10, 2022 PoC Published (3 in total, the first dated here)
- Apr 30, 2026 Distribution Patch
- Apr 30, 2026 Security Advisory (2 in total, the first dated here)
- Jun 17, 2026 CVE Updated
- Jul 17, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2021-44528
vulnetix vdb fixes CVE-2021-44528Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2021-44528/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart