CVE-2021-39185
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Default CORS config allows any origin with credentials
Http4s is a minimal, idiomatic Scala interface for HTTP services. In http4s versions 0.21.26 and prior, 0.22.0 through 0.22.2, 0.23.0, 0.23.1, and 1.0.0-M1 through 1.0.0-M24, the default CORS configuration is vulnerable to an origin reflection attack. The middleware is also susceptible to a Null Origin Attack. The problem is fixed in 0.21.27, 0.22.3, 0.23.2, and 1.0.0-M25. The original `CORS` implementation and `CORSConfig` are deprecated. See the GitHub GHSA for more information, including code examples and workarounds.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
http4s
- Vendor
- http4s
- Product
- http4s
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| < 0.21.27 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 0.22.0, < 0.22.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 0.23.0, < 0.23.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 1.0.0-M1, <= 1.0.0-M24 | affected | Unavailable | Unavailable | Unavailable | None listed |