CVE-2026-63828: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-fvhv-v8p3-vrwq
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CVSS 8.4
Published
Advisory Summary

CVE-2026-63828 is a HIGH (CVSS 8.4) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63828 at a Glance

CVE Identifier CVE-2026-63828
GHSA Identifier GHSA-fvhv-v8p3-vrwq
Severity HIGH
CVSS v3.1 Base Score 8.4
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.4

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

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

How to Fix CVE-2026-63828

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

Verify Direct and Transitive Dependencies

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

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-63828, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Software, 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

In the Linux kernel, the following vulnerability has been resolved: apparmor: mediate the implicit connect of TCP fast open sendmsg sendmsg()/sendto() with MSG_FASTOPEN is a combination of connect(2) and write(2): it opens the connection in the SYN. apparmor_socket_sendmsg() only checks AA_MAY_SEND, so a profile that grants send but denies connect lets a confined task open an outbound TCP/MPTCP connection that connect(2) would have refused, bypassing connect mediation. Mediate the implicit connect when MSG_FASTOPEN is set and a destination is supplied. Add it to apparmor_socket_sendmsg() (not the shared aa_sock_msg_perm() helper, which recvmsg also uses) and call aa_sk_perm() directly, mirroring the selinux and tomoyo fixes. sk_is_tcp() does not cover MPTCP fast open, so the SOCK_STREAM/IPPROTO_MPTCP arm is explicit.

References

NVD — CVE-2026-63828 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63828
git.kernel.org/stable/c/07b71c3423... WEB
https://git.kernel.org/stable/c/07b71c342382b854ab8030b244aeab6a7228ad7d
git.kernel.org/stable/c/20383429b5... WEB
https://git.kernel.org/stable/c/20383429b56974507c465d016e5238b189f7a246
git.kernel.org/stable/c/45ebb934ea... WEB
https://git.kernel.org/stable/c/45ebb934ea50b436ce49b2f159f090dab0d7fa28
git.kernel.org/stable/c/4a69b83045... WEB
https://git.kernel.org/stable/c/4a69b83045d3195d5b9a9b053ad840ddb2998b4e
git.kernel.org/stable/c/4d587cd8a7... WEB
https://git.kernel.org/stable/c/4d587cd8a72155089a627130bbd4716ec0856e21
git.kernel.org/stable/c/7f57428ce0... WEB
https://git.kernel.org/stable/c/7f57428ce00891d26b0f087ef754a4d820ec83aa
git.kernel.org/stable/c/a16714e7cf... WEB
https://git.kernel.org/stable/c/a16714e7cf2baa98ba2efddd5d6cbac641f4e76b
git.kernel.org/stable/c/faea60deaa... WEB
https://git.kernel.org/stable/c/faea60deaa05c76f0772650f42eafde12bd39d93

Frequently Asked Questions

What is CVE-2026-63828?
CVE-2026-63828 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-63828?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-63828?
CVE-2026-63828 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
What CWE is associated with CVE-2026-63828?
CVE-2026-63828 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63828?
Run the dependency tree command: 'mvn dependency:tree'. 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
View Raw JSON 
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  "id" : "GHSA-fvhv-v8p3-vrwq",
  "modified" : "2026-07-24T15:32:43Z",
  "published" : "2026-07-19T12:30:24Z",
  "aliases" : [ "CVE-2026-63828" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: mediate the implicit connect of TCP fast open sendmsg\n\nsendmsg()/sendto() with MSG_FASTOPEN is a combination of connect(2) and\nwrite(2): it opens the connection in the SYN. apparmor_socket_sendmsg()\nonly checks AA_MAY_SEND, so a profile that grants send but denies connect\nlets a confined task open an outbound TCP/MPTCP connection that connect(2)\nwould have refused, bypassing connect mediation.\n\nMediate the implicit connect when MSG_FASTOPEN is set and a destination\nis supplied. Add it to apparmor_socket_sendmsg() (not the shared\naa_sock_msg_perm() helper, which recvmsg also uses) and call aa_sk_perm()\ndirectly, mirroring the selinux and tomoyo fixes. sk_is_tcp() does not\ncover MPTCP fast open, so the SOCK_STREAM/IPPROTO_MPTCP arm is explicit.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63828"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/07b71c342382b854ab8030b244aeab6a7228ad7d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/20383429b56974507c465d016e5238b189f7a246"
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    "type" : "WEB",
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/faea60deaa05c76f0772650f42eafde12bd39d93"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T12:16:56Z"
  }
}