Description
Missing cryptographic key commitment in the AWS SDK for Ruby may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record.
To mitigate this issue, upgrade AWS SDK for Ruby to version 1.208.0 or later.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AWS | AWS SDK for Ruby | — | 1.208.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | ruby-aws-sdk | No fix yet | — |
| Ubuntu 26.04 LTS | ruby-aws-sdk | No fix yet | — |
| Ubuntu 25.10 | ruby-aws-sdk | No fix yet | — |
| Ubuntu 24.04 LTS | ruby-aws-sdk | No fix yet | — |
| Ubuntu 22.04 LTS | ruby-aws-sdk | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | ruby-aws-sdk | No fix yet | — |
| Ubuntu 18.04 LTS | ruby-aws-sdk | No fix yet | — |
| Ubuntu 16.04 LTS | ruby-aws-sdk | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | kube-fluentd-operator +3 | 1.18.2-r54 | — |
| Wolfi rolling | ruby3.2-aws-sdk-s3 | 1.209.0-r0 | — |
| Wolfi rolling | ruby3.3-aws-sdk-s3 +2 | 1.217.0-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | aws-sdk-s3 | < 1.208.0 | 1.208.0 | GHSA-2xgq-q749-89fq |
Advisories 1
- WID-SEC-2026-0552 Fluentd: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 26, 2026