CVE-2021-21409
MediumAdvisory
Published 30 Mar 2021In the index since 6 Sept 2026
- Severity
- Medium
- worst across findings
- CVSS
- 5.9
- base score, highest
- EPSS
- 0.049
- 92nd percentile
- CISA KEV
- Not listed
- no confirmed exploitation
- Charts affected
- 135
- of 17,781 indexed, latest versions
- Container images
- 139
- deployed by those charts
- Fix available
- 1 of 2
- affected packages
Possible request smuggling in HTTP/2 due missing validation of content-length
Carried by container images the latest versions of 135 of 17,781 indexed charts deploy, on 139 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| netty-codec-http2maven | 4.1.12.Final, 4.1.19.Final, 4.1.22.Final, 4.1.24.Final+18 more | 4.1.61.Final | 82 |
| nettymaven | 3.2.10.Final, 3.6.1.Final, 3.6.2.Final, 3.6.6.Final+6 more | no fix listed | 66 |
- OSV records
- GHSA-f256-j965-7f32
Charts affected
135 by stars
Container images carrying it
139 by charts deploying them
A fixed version is listed for 1 of the 2 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| omecproject/ | 28a90cc26716 | netty | no fix listed | 1 |
| omecproject/ | b4ae7d0d6b74 | netty-codec-http2 | 4.1.61.Final | 1 |
| omecproject/ | 5715e5648aa0 | netty | no fix listed | 1 |
| onosproject/ | 44914a8d4b3f | netty netty-codec-http2 | no fix listed 4.1.61.Final | 1 |
| openwhisk/ | f5831ec85525 | netty netty-codec-http2 | no fix listed 4.1.61.Final | 1 |
| openzipkin/ | 60c3970df479 | netty-codec-http2 | 4.1.61.Final | 1 |
| openzipkin/ | b5d51d1144e2 | netty-codec-http2 | 4.1.61.Final | 1 |
| oscarsotosanchez/ | 730c00a099b8 | netty-codec-http2 | 4.1.61.Final | 1 |
| pcarrascoponce/ | 981fc482442c | netty-codec-http2 | 4.1.61.Final | 1 |
| platform9community/ | de3fa9b70df1 | netty-codec-http2 | 4.1.61.Final | 1 |
| platform9community/ | 40a4970de568 | netty-codec-http2 | 4.1.61.Final | 1 |
| radarbase/ | 1d2af7dd5a4e | netty | no fix listed | 1 |
| raykrueger/ | c8baf3de57bb | netty | no fix listed | 1 |
| salaboy/ | f225568e6d03 | netty-codec-http2 | 4.1.61.Final | 1 |
| seldonio/ | ba81b17f00eb | netty-codec-http2 | 4.1.61.Final | 1 |
| seldonio/ | eea0d3f578ca | netty-codec-http2 | 4.1.61.Final | 1 |
| slagattollas/ | cecd95e31486 | netty-codec-http2 | 4.1.61.Final | 1 |
| slagattollas/ | dc63973dae0d | netty-codec-http2 | 4.1.61.Final | 1 |
| slamdev/ | b4b029c9b15f | netty | no fix listed | 1 |
| snappydatainc/ | fd4b2070466f | netty | no fix listed | 1 |
| snowplow/ | 41d318841516 | netty-codec-http2 | 4.1.61.Final | 1 |
| sslhep/ | 9e80af083079 | netty | no fix listed | 1 |
| thmmniii/ | 86105349c1a3 | netty-codec-http2 | 4.1.61.Final | 1 |
| torrespro/ | 6d3bd305a1ba | netty-codec-http2 | 4.1.61.Final | 1 |
| trinodb/ | 38c6f24ab1a4 | netty | no fix listed | 1 |
| trinodb/ | ee80ab5eeab2 | netty | no fix listed | 1 |
| voltha/ | e038acb950d3 | netty netty-codec-http2 | no fix listed 4.1.61.Final | 1 |
| wavefronthq/ | d1064d28f6eb | netty-codec-http2 | 4.1.61.Final | 1 |
| xetusoss/ | 88f25242b9ee | netty | no fix listed | 1 |
| zbalogh/ | 7c247e399a1f | netty-codec-http2 | 4.1.61.Final | 1 |
| gcr.io/ | 0ee5f968d2ab | netty-codec-http2 | 4.1.61.Final | 1 |
| ghcr.io/ | ac62269785ac | netty | no fix listed | 1 |
| ghcr.io/ | 8caf5289fe73 | netty | no fix listed | 1 |
| ghcr.io/ | 00ce11c31087 | netty-codec-http2 | 4.1.61.Final | 1 |
| ghcr.io/ | a573fb9bc809 | netty-codec-http2 | 4.1.61.Final | 1 |
| ghcr.io/ | e949b0f733f0 | netty | no fix listed | 1 |
| ghcr.io/ | 8368359c8dd0 | netty | no fix listed | 1 |
| ghcr.io/ | b83b5b81d4b6 | netty | no fix listed | 1 |
| public.ecr.aws/ | 794b3bff9510 | netty | no fix listed | 1 |