rustls before 0.23.46 Denial of Service via Brotli Certificate Decompression
Historical advisory recorded 9 Nov 2026 15:02:10 UTC. Read the latest advisory.
cve-program · CVE-2026-123610
Publishedrustls before 0.23.46 contains an uncontrolled memory allocation flaw in its optional Brotli certificate decompression, which limits decompressed output size but accepts an input-selected large history window. Malicious peers can send a certificate with a five-byte Brotli header requesting up to 1 GiB before authentication, aborting Brotli-enabled clients or client-authenticating servers whose allocator cannot satisfy the request.
Read the publisher's advisoryAffected versions, risk and source history
cve-program · CVE-2026-123610
Publishedrustls before 0.23.46 Denial of Service via Brotli Certificate Decompression
rustls before 0.23.46 contains an uncontrolled memory allocation flaw in its optional Brotli certificate decompression, which limits decompressed output size but accepts an input-selected large history window. Malicious peers can send a certificate with a five-byte Brotli header requesting up to 1 GiB before authentication, aborting Brotli-enabled clients or client-authenticating servers whose allocator cannot satisfy the request.
- Source published
- 8 Nov 2026 01:38:35 UTC
- Source modified
- 9 Nov 2026 13:52:03 UTC
- Saved here
- 9 Nov 2026 15:02:10 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 4.0 · 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1 · 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L