What is CVE-2026-10740?

CVE-2026-10740 is a medium-severity vulnerability in Aws S2n-quic, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-06-10.

How severe is CVE-2026-10740?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Aws S2n-quic

CVE-2026-10740

Unbounded memory allocation in the CRYPTO frame reassembler in s2n-quic before 1.8.2 may allow an unauthenticated remote actor to cause a denial of service (degraded availability) by sending crafted QUIC Initial packets. To remediate th…

EPSS: 0.003 (21.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Aws S2n-quic — versions 0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)

Frequently asked questions

What is CVE-2026-10740?: CVE-2026-10740 is a medium-severity vulnerability in Aws S2n-quic, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-06-10.
How severe is CVE-2026-10740?: Medium severity. CVSS v3 base score is 5.3 out of 10.