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6.2
MEDIUM CVSS 3.1
CVE-2025-61730
Handshake messages may be processed at the incorrect encryption level in crypto/tls
Description

During the TLS 1.3 handshake if multiple messages are sent in records that span encryption level boundaries (for instance the Client Hello and Encrypted Extensions messages), the subsequent messages may be processed before the encryption level changes. This can cause some minor information disclosure if a network-local attacker can inject messages during the handshake.

INFO

Published Date :

Jan. 28, 2026, 8:16 p.m.

Last Modified :

Feb. 3, 2026, 8:36 p.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-61730 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Golang go
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Apply TLS 1.3 security updates to prevent handshake message processing issues and information disclosure.
  • Update systems to the latest TLS 1.3 implementation.
  • Ensure proper handling of handshake message boundaries.
  • Validate encryption level transitions during handshakes.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-61730.

URL Resource
https://go.dev/cl/724120 Patch
https://go.dev/issue/76443 Patch
https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc Release Notes
https://pkg.go.dev/vuln/GO-2026-4340 Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-61730 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-61730 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-61730 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-61730 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Feb. 03, 2026

    Action Type Old Value New Value
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* versions up to (excluding) 1.24.12 *cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* versions from (including) 1.25.0 up to (excluding) 1.25.6
    Added Reference Type Go Project: https://go.dev/cl/724120 Types: Patch
    Added Reference Type Go Project: https://go.dev/issue/76443 Types: Patch
    Added Reference Type Go Project: https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc Types: Release Notes
    Added Reference Type Go Project: https://pkg.go.dev/vuln/GO-2026-4340 Types: Vendor Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Feb. 02, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    Removed CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jan. 29, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • New CVE Received by [email protected]

    Jan. 28, 2026

    Action Type Old Value New Value
    Added Description During the TLS 1.3 handshake if multiple messages are sent in records that span encryption level boundaries (for instance the Client Hello and Encrypted Extensions messages), the subsequent messages may be processed before the encryption level changes. This can cause some minor information disclosure if a network-local attacker can inject messages during the handshake.
    Added Reference https://go.dev/cl/724120
    Added Reference https://go.dev/issue/76443
    Added Reference https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc
    Added Reference https://pkg.go.dev/vuln/GO-2026-4340
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.2
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact