Vulnerabilities in pkg:golang/golang.org/x/crypto

PACKAGE
Advisory Identifier: GHSA-vgwf-h737-ff37
Advisory Summary

CVE-2026-39830 is a CRITICAL (CVSS 9.1) invoking client can cause server vulnerability (CWE-772: Missing Release of Resource after Effective Lifetime) affecting Golang.org/x/crypto libraries in the Go ecosystem. The issue involves invoking client can cause server deadlock on unexpected responses. Remediation is available by upgrading affected packages to version 0.52.0.

26 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/golang.org/x/crypto

26 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/golang.org/x/crypto. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-vgwf-h737-ff37 CVE-2026-39830 CRITICAL golang.org/x/crypto: Invoking client can cause server deadlock on unexpected responses
GHSA-78mq-xcr3-xm33 CVE-2026-39835 MODERATE golang.org/x/crypto is vulnerable to invoking server panic during CheckHostKey/Authenticate flow
GHSA-f5wc-c3c7-36mc CVE-2026-39832 CRITICAL golang.org/x/crypto doesn't drop invoking agent constraints when forwarding keys
GHSA-45gg-vh54-h5m9 CVE-2026-39828 MODERATE golang.org/x/crypto vulnerable to invoking bypass of certificate restrictions
GHSA-w879-237q-wc7r CVE-2026-39829 HIGH golang.org/x/crypto: Invoking pathological RSA/DSA parameters may cause DoS
GHSA-x527-x647-q7gg CVE-2026-46595 CRITICAL golang.org/x/crypto: Invoking VerifiedPublicKeyCallback permissions skip enforcement
GHSA-5cgq-3rg8-m6cv CVE-2026-42508 CRITICAL golang.org/x/crypto vulnerable to auth bypass via unenforced @revoked status
GHSA-9m57-25v3-79x9 CVE-2026-46598 MODERATE golang.org/x/crypto: Invoking pathological inputs can lead to client panic
GHSA-jppx-rxg9-jmrx CVE-2026-39833 CRITICAL golang.org/x/crypto doesn't enforce invoking key constraints
GHSA-rm3j-f69w-wqmq CVE-2026-39834 CRITICAL golang.org/x/crypto vulnerable to infinite loop on large channel writes
GHSA-89gr-r52h-f8rx CVE-2026-39831 CRITICAL golang.org/x/crypto: FIDO/U2F security key physical presence check can be bypassed
GHSA-qpw4-5x99-6vjp CVE-2026-39827 MODERATE golang.org/x/crypto: Invoking memory leak when rejecting channels can lead to DoS
GHSA-q4h4-gmj2-qvw2 CVE-2026-46597 HIGH golang.org/x/crypto: Invoking byte arithmetic causes underflow and panic
GHSA-45x7-px36-x8w8 CVE-2023-48795 MODERATE Prefix Truncation Attack against ChaCha20-Poly1305 and Encrypt-then-MAC aka Terrapin
GHSA-f6x5-jh6r-wrfv CVE-2025-47914 MODERATE golang.org/x/crypto/ssh/agent vulnerable to panic if message is malformed due to out of bounds read
GHSA-j5w8-q4qc-rx2x CVE-2025-58181 MODERATE golang.org/x/crypto/ssh allows an attacker to cause unbounded memory consumption
GHSA-hcg3-q754-cr77 CVE-2025-22869 HIGH golang.org/x/crypto Vulnerable to Denial of Service (DoS) via Slow or Incomplete Key Exchange
GHSA-v778-237x-gjrc CVE-2024-45337 CRITICAL Misuse of ServerConfig.PublicKeyCallback may cause authorization bypass in golang.org/x/crypto
GHSA-cjjc-xp8v-855w CVE-2020-7919 HIGH Helm uses crypto package vulnerable to panic from malformed X.509 certificate
GHSA-xhjq-w7xm-p8qj CVE-2017-3204 HIGH golang.org/x/crypto/ssh Man-in-the-Middle attack
GHSA-x3jr-pf6g-c48f CVE-2019-11841 MODERATE Golang/x/crypto message forgery vulnerability
GHSA-r5c5-pr8j-pfp7 CVE-2019-11840 MODERATE golang.org/x/crypto/salsa20/salsa uses insufficiently random values
GHSA-8c26-wmh5-6g9v CVE-2022-27191 HIGH golang.org/x/crypto/ssh Denial of service via crafted Signer
GHSA-gwc9-m7rh-j2ww CVE-2021-43565 HIGH x/crypto/ssh vulnerable to panic via malformed packets
GHSA-3vm4-22fp-5rfm CVE-2020-29652 HIGH golang.org/x/crypto/ssh NULL Pointer Dereference vulnerability
GHSA-ffhg-7mh4-33c4 CVE-2020-9283 HIGH Improper Verification of Cryptographic Signature in golang.org/x/crypto

CVE-2026-39830 at a Glance

CVE Identifier CVE-2026-39830
GHSA Identifier GHSA-vgwf-h737-ff37
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-772: Missing Release of Resource after Effective Lifetime
Affected Product Golang.org/x/crypto
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-39830

To remediate this vulnerability, upgrade all affected Golang.org/x/crypto dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

golang.org/x/crypto fixed: 0.52.0
Upgrade golang.org/x/crypto to 0.52.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

inspect dependencies for golang.org/x/crypto

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-39830, inspect your project dependencies for Golang.org/x/crypto:

inspect dependencies for golang.org/x/crypto

Analyze the terminal output to locate any version of Golang.org/x/crypto in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.52.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-772: Missing Release of Resource after Effective Lifetime, where the product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed. In Golang.org/x/crypto, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

CVE-2026-39830 Affected Golang.org/x/crypto Versions

1 component(s)
Fixed Versions:
0.52.0
Product / Package Ecosystem Affected Versions Fixed Version
golang.org/x/crypto
Go
< 0.52.0
0.52.0

References

NVD — CVE-2026-39830 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39830
access.redhat.com/errata/rhsa-2026:42... WEB
https://access.redhat.com/errata/RHSA-2026:42796
access.redhat.com/errata/rhsa-2026:43... WEB
https://access.redhat.com/errata/RHSA-2026:43052
access.redhat.com/errata/rhsa-2026:43... WEB
https://access.redhat.com/errata/RHSA-2026:43692
access.redhat.com/errata/rhsa-2026:46... WEB
https://access.redhat.com/errata/RHSA-2026:46885
access.redhat.com/errata/rhsa-2026:47... WEB
https://access.redhat.com/errata/RHSA-2026:47735
access.redhat.com/errata/rhsa-2026:48... WEB
https://access.redhat.com/errata/RHSA-2026:48151
access.redhat.com/errata/rhsa-2026:49... WEB
https://access.redhat.com/errata/RHSA-2026:49944
access.redhat.com/errata/rhsa-2026:51... WEB
https://access.redhat.com/errata/RHSA-2026:51033
access.redhat.com/errata/rhsa-2026:52... WEB
https://access.redhat.com/errata/RHSA-2026:52857
access.redhat.com/errata/rhsa-2026:52... WEB
https://access.redhat.com/errata/RHSA-2026:52910
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54400
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54531
access.redhat.com/errata/rhsa-2026:57... WEB
https://access.redhat.com/errata/RHSA-2026:57194
access.redhat.com/errata/rhsa-2026:57... WEB
https://access.redhat.com/errata/RHSA-2026:57801
access.redhat.com/errata/rhsa-2026:59... WEB
https://access.redhat.com/errata/RHSA-2026:59467
access.redhat.com/errata/rhsa-2026:60... WEB
https://access.redhat.com/errata/RHSA-2026:60520
access.redhat.com/errata/rhsa-2026:61... WEB
https://access.redhat.com/errata/RHSA-2026:61314
access.redhat.com/errata/rhsa-2026:65... WEB
https://access.redhat.com/errata/RHSA-2026:65964
access.redhat.com/errata/rhsa-2026:66... WEB
https://access.redhat.com/errata/RHSA-2026:66022
access.redhat.com/errata/rhsa-2026:66... WEB
https://access.redhat.com/errata/RHSA-2026:66521
access.redhat.com/errata/rhsa-2026:67... WEB
https://access.redhat.com/errata/RHSA-2026:67450
Golang.org/x/crypto Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-39830
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2480684
cs.opensource.google/go/x/crypto PACKAGE
https://cs.opensource.google/go/x/crypto
go.dev/cl/781640 WEB
https://go.dev/cl/781640
go.dev/cl/781664 WEB
https://go.dev/cl/781664
go.dev/issue/79564 WEB
https://go.dev/issue/79564
groups.google.com/g/golang-announce/c... WEB
https://groups.google.com/g/golang-announce/c/a082jnz-LvI
pkg.go.dev/vuln/go-2026-5017 WEB
https://pkg.go.dev/vuln/GO-2026-5017
Golang.org/x/crypto Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39830.json
access.redhat.com/errata/rhsa-2026:29... WEB
https://access.redhat.com/errata/RHSA-2026:29455
access.redhat.com/errata/rhsa-2026:35... WEB
https://access.redhat.com/errata/RHSA-2026:35833
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36199
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36207
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36319
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36625
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36648
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36651
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36796
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36797
access.redhat.com/errata/rhsa-2026:36... WEB
https://access.redhat.com/errata/RHSA-2026:36808
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37072
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37268
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37271
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37272
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37275
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37278
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37286
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37296
access.redhat.com/errata/rhsa-2026:37... WEB
https://access.redhat.com/errata/RHSA-2026:37387
access.redhat.com/errata/rhsa-2026:40... WEB
https://access.redhat.com/errata/RHSA-2026:40118
access.redhat.com/errata/rhsa-2026:40... WEB
https://access.redhat.com/errata/RHSA-2026:40262
access.redhat.com/errata/rhsa-2026:40... WEB
https://access.redhat.com/errata/RHSA-2026:40945
access.redhat.com/errata/rhsa-2026:40... WEB
https://access.redhat.com/errata/RHSA-2026:40969
access.redhat.com/errata/rhsa-2026:40... WEB
https://access.redhat.com/errata/RHSA-2026:40972
access.redhat.com/errata/rhsa-2026:40... WEB
https://access.redhat.com/errata/RHSA-2026:40974
access.redhat.com/errata/rhsa-2026:41... WEB
https://access.redhat.com/errata/RHSA-2026:41019
access.redhat.com/errata/rhsa-2026:41... WEB
https://access.redhat.com/errata/RHSA-2026:41031
access.redhat.com/errata/rhsa-2026:41... WEB
https://access.redhat.com/errata/RHSA-2026:41036
access.redhat.com/errata/rhsa-2026:41... WEB
https://access.redhat.com/errata/RHSA-2026:41066
access.redhat.com/errata/rhsa-2026:42... WEB
https://access.redhat.com/errata/RHSA-2026:42146

Frequently Asked Questions

What is CVE-2026-39830?
CVE-2026-39830 is a security vulnerability in Golang.org/x/crypto involving Invoking client can cause server deadlock on unexpected responses under CWE-772: Missing Release of Resource after Effective Lifetime.
Which Golang.org/x/crypto versions are affected?
Affected versions include releases prior to 0.52.0 across affected packages: golang.org/x/crypto.
What version fixes CVE-2026-39830?
Upgrading to 0.52.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is golang.org/x/crypto affected?
Yes, golang.org/x/crypto is affected in releases prior to 0.52.0. Upgrade your dependency to 0.52.0 or later.
What is the CVSS score of CVE-2026-39830?
CVE-2026-39830 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2026-39830?
CVE-2026-39830 is classified under CWE-772: Missing Release of Resource after Effective Lifetime (The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.).
How can I check Go dependencies for CVE-2026-39830?
Run the dependency tree command: 'inspect dependencies for golang.org/x/crypto'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vgwf-h737-ff37",
  "modified" : "2026-09-15T12:31:41Z",
  "published" : "2026-06-25T22:18:17Z",
  "aliases" : [ "CVE-2026-39830" ],
  "summary" : "golang.org/x/crypto: Invoking client can cause server deadlock on unexpected responses",
  "details" : "A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "golang.org/x/crypto"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.52.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-39830"
  }, {
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    "url" : "https://access.redhat.com/errata/RHSA-2026:40972"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:40974"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:41019"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:41031"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:41036"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:41066"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:42146"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119", "CWE-772" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-25T22:18:17Z",
    "nvd_published_at" : "2026-05-22T04:16:22Z"
  }
}