---
cve: "CVE-2026-3337"
severity: "HIGH"
cvss: 8.2
epss: "1.1%"
vendor: "aws"
kev: false
exploited: false
published: "2026-03-02 22:16:32"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T08:11:22+02:00"
---

# CVE-2026-3337

> 8.2 HIGH · 🧪 PoC

## Beschreibung

Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.




The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.




Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 37d86461a95782fd5d8b77873f9e1cb134ea2f95 (Commit)
- e50a5f29ee416a7c99be4e72957e8f96aa51dbb9 (Commit)

## Referenzen

- <https://aws.amazon.com/security/security-bulletins/2026-005-AWS/>
- <https://github.com/aws/aws-lc/releases/tag/v1.69.0>
- <https://github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxh>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-3337) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_