LowVulnerabilityGHSA-vp88-798v-h67fupdated 27 Oct 2026, 16:09 UTC
rustls: ECH rejection can expose buffered application data to authenticated outer server before `ech_required` alert
Fixed in rustls 0.23.46, rustls 0.24.0-dev.2Official source
| Severity | LowCVSS 2.3 of 10 |
|---|---|
| Being exploited? | UnclearNo reports either way yet |
| Fix available? | Yesrustls 0.23.46, rustls 0.24.0-dev.2 · since 27 Oct 2026 |
| How sure is this? | Official sourceBacked by an official source |
Are you affected?
| Package / product | Affected versions | Fixed in |
|---|---|---|
| rustls · rust | >= 0.23.44, < 0.23.46 | 0.23.46 |
| rustls · rust | >= 0.24.0-dev.1, < 0.24.0-dev.2 | 0.24.0-dev.2 |
Timeline
- 27 Oct 2026, 16:08 UTCPublicly disclosed
- 27 Oct 2026, 16:08 UTCReported by GitHub Advisory · GitHub Advisory
- 27 Oct 2026, 16:09 UTCPicked up by Zero Radar
Sources 1 report, oldest first
Official vendor, government CERT or advisory database
- rustls: ECH rejection can expose buffered application data to authenticated outer server before `ech_required` alertGitHub Advisory · 27 Oct 2026, 16:08 UTC
Technical details
- ID
- GHSA-vp88-798v-h67f
- CVSS
- 2.3 / 10
- Disclosed
- 27 Oct 2026, 16:08 UTC
- On Zero Radar
- 27 Oct 2026, 16:09 UTC (1 min after disclosure)
- Last change
- 27 Oct 2026, 16:09 UTC
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