CVE-2026-63817: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-cv79-fx5q-34h3
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CVSS 7.8
Published
Advisory Summary

CVE-2026-63817 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63817 at a Glance

CVE Identifier CVE-2026-63817
GHSA Identifier GHSA-cv79-fx5q-34h3
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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:U/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2026-63817

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-2026-63817, 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 compress cache inode only when enabled F2FS_COMPRESS_INO() uses NM_I(sbi)->max_nid as the synthetic inode number for the compressed page cache inode. That inode only exists when the compress_cache mount option is enabled. When compress_cache is disabled, max_nid is outside the valid inode range. A corrupted directory entry that points to ino == max_nid should therefore be rejected by f2fs_check_nid_range(). However, is_meta_ino() currently treats F2FS_COMPRESS_INO() as a meta inode unconditionally, so f2fs_iget() bypasses do_read_inode() and its nid range check, and instantiates a fake internal inode instead. Gate the compressed cache inode case on COMPRESS_CACHE, matching f2fs_init_compress_inode(). With compress_cache disabled, ino == max_nid now follows the normal inode path and is rejected as an out-of-range nid.

References

NVD — CVE-2026-63817 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63817
git.kernel.org/stable/c/0969926d98... WEB
https://git.kernel.org/stable/c/0969926d987bbde9a1aa49da317582ba37095805
git.kernel.org/stable/c/13e4b59d3a... WEB
https://git.kernel.org/stable/c/13e4b59d3a9413f66f116fa6c4828519b960a5ea
git.kernel.org/stable/c/16161444c3... WEB
https://git.kernel.org/stable/c/16161444c30d8dff9428abbae42b72ce4e32a932
git.kernel.org/stable/c/29115b8c91... WEB
https://git.kernel.org/stable/c/29115b8c9172d34e67ab26cc4f6c209b7a236d7a
git.kernel.org/stable/c/5073c66a96... WEB
https://git.kernel.org/stable/c/5073c66a96a9c23c0c2533ed4ed06e42f9021208
git.kernel.org/stable/c/77f216ff9c... WEB
https://git.kernel.org/stable/c/77f216ff9ce5cde8eed9f6d12707e906dffdc9f7
git.kernel.org/stable/c/fcc051d377... WEB
https://git.kernel.org/stable/c/fcc051d377a9701a452e7663a1a8223c26225df9

Frequently Asked Questions

What is CVE-2026-63817?
CVE-2026-63817 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-2026-63817?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-63817?
CVE-2026-63817 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-63817?
CVE-2026-63817 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63817?
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-cv79-fx5q-34h3",
  "modified" : "2026-07-24T15:32:43Z",
  "published" : "2026-07-19T12:30:23Z",
  "aliases" : [ "CVE-2026-63817" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: validate compress cache inode only when enabled\n\nF2FS_COMPRESS_INO() uses NM_I(sbi)->max_nid as the synthetic inode\nnumber for the compressed page cache inode. That inode only exists when\nthe compress_cache mount option is enabled.\n\nWhen compress_cache is disabled, max_nid is outside the valid inode\nrange. A corrupted directory entry that points to ino == max_nid should\ntherefore be rejected by f2fs_check_nid_range(). However, is_meta_ino()\ncurrently treats F2FS_COMPRESS_INO() as a meta inode unconditionally,\nso f2fs_iget() bypasses do_read_inode() and its nid range check, and\ninstantiates a fake internal inode instead.\n\nGate the compressed cache inode case on COMPRESS_CACHE, matching\nf2fs_init_compress_inode(). With compress_cache disabled, ino ==\nmax_nid now follows the normal inode path and is rejected as an\nout-of-range nid.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
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    "url" : "https://git.kernel.org/stable/c/0969926d987bbde9a1aa49da317582ba37095805"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/13e4b59d3a9413f66f116fa6c4828519b960a5ea"
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    "url" : "https://git.kernel.org/stable/c/fcc051d377a9701a452e7663a1a8223c26225df9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T12:16:54Z"
  }
}