CVE-2026-32283 | BDVDB-2026-325668 Detail

Go standard librarycrypto/tls

Description#

If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-667 Improper Locking
CWE-764 Multiple Locks of a Critical Resource

References#

Show all 40

Exploit#

No public exploit known

History#

Version 12026-04-08Record published in the CVE List.
Version 22026-09-18Most recent update recorded in the CVE List.

Published

Published: 2026-04-08
Last modified: 2026-09-18

Vendor information

Vendor: Go standard library
Product: crypto/tls

All Go standard library vulnerabilities

Score

7.5 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 50.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 1.25.9
Fixed
1.25.9
Vulnerable
>= 1.26.0-0 and < 1.26.2
Fixed
1.26.2

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.5 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).