Dashboard / CVE-2026-123612

CVE-2026-123612

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 29/100
Published: 2026-11-08 Modified: 2026-11-12 First seen: 2026-11-08 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: High
UI: None
S: X
AT: None
VC: Low
VI: None
VA: None

Description

rustls 0.23.44 and 0.23.45 contain an information disclosure vulnerability that sends application data buffered before the handshake completes to the client-facing server when Encrypted Client Hello is rejected. Because start_traffic() queues plaintext from ClientConnection::writer() before sending the ech_required alert, the authenticated public_name server receives data intended for the inner server.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
rustls rustls 0.23.44 < 0.23.46
rustls rustls 0.23.44 < 0.23.46

References & Advisories (2)

Bug Bounty Relevance

29 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

4.6 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.11%
Raw Score 0.001100
Percentile 1.3%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00110
2026-11-12
0.00110
2026-11-10
0.00110
2026-11-09
0.00110
2026-11-08
0.00110

Intelligence Sources

mitre ref →
nvd ref →

External Links