CVE-2026-63818: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-2q7w-rghx-vwh8
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CVSS 8.4
Published
Advisory Summary

CVE-2026-63818 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-2026-63818 at a Glance

CVE Identifier CVE-2026-63818
GHSA Identifier GHSA-2q7w-rghx-vwh8
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:N/UI:N/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2026-63818

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-2026-63818, 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: f2fs: validate orphan inode entry count f2fs_recover_orphan_inodes() trusts the orphan block entry_count when replaying orphan inodes from the checkpoint pack. A corrupted entry_count larger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the ino[] array and interpret footer or following data as inode numbers. On a crafted image, mounting an unpatched kernel can drive orphan recovery into f2fs_bug_on() and panic the kernel. Validate entry_count before consuming entries so corrupted checkpoint data fails the mount with -EFSCORRUPTED and requests fsck instead. Set ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be recorded in the superblock s_errors[] field. This gives fsck a persistent hint even though mount-time orphan recovery failure may leave no chance to persist SBI_NEED_FSCK through a checkpoint.

References

NVD — CVE-2026-63818 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63818
git.kernel.org/stable/c/210c210c92... WEB
https://git.kernel.org/stable/c/210c210c92d78fdf5051bc55c5c69044b1a2150a
git.kernel.org/stable/c/2e12381d44... WEB
https://git.kernel.org/stable/c/2e12381d4495dc8b0ff042c6856022b2e359835c
git.kernel.org/stable/c/550511a247... WEB
https://git.kernel.org/stable/c/550511a2470f6d204fa07b331f048bd2d3c51280
git.kernel.org/stable/c/846c499a65... WEB
https://git.kernel.org/stable/c/846c499a65816d13f1186e3090e825e8bb8bcb8b
git.kernel.org/stable/c/8aad54746c... WEB
https://git.kernel.org/stable/c/8aad54746c251f2c2370118df766c0c82e2d2091
git.kernel.org/stable/c/ad101d1571... WEB
https://git.kernel.org/stable/c/ad101d15716f5a24d1fa82a849f80430c805a3dd
git.kernel.org/stable/c/d18c81f5d0... WEB
https://git.kernel.org/stable/c/d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70
git.kernel.org/stable/c/d2f236196d... WEB
https://git.kernel.org/stable/c/d2f236196d542ccd8505736e41c3a1d3f0305f6f

Frequently Asked Questions

What is CVE-2026-63818?
CVE-2026-63818 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-2026-63818?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-63818?
CVE-2026-63818 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-63818?
CVE-2026-63818 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63818?
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-2q7w-rghx-vwh8",
  "modified" : "2026-07-24T15:32:43Z",
  "published" : "2026-07-19T12:30:23Z",
  "aliases" : [ "CVE-2026-63818" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: validate orphan inode entry count\n\nf2fs_recover_orphan_inodes() trusts the orphan block entry_count when\nreplaying orphan inodes from the checkpoint pack. A corrupted entry_count\nlarger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the\nino[] array and interpret footer or following data as inode numbers.\n\nOn a crafted image, mounting an unpatched kernel can drive orphan recovery\ninto f2fs_bug_on() and panic the kernel. Validate entry_count before\nconsuming entries so corrupted checkpoint data fails the mount with\n-EFSCORRUPTED and requests fsck instead.\n\nSet ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be\nrecorded in the superblock s_errors[] field. This gives fsck a persistent\nhint even though mount-time orphan recovery failure may leave no chance to\npersist SBI_NEED_FSCK through a checkpoint.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
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    "url" : "https://git.kernel.org/stable/c/210c210c92d78fdf5051bc55c5c69044b1a2150a"
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  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T12:16:54Z"
  }
}