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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-41401 Detail

Description

libyang before 5.2.6 contains a heap use-after-free write vulnerability in lyd_parser_set_data_flags that incorrectly updates metadata list pointers when freeing non-head default metadata entries. Attackers can trigger this vulnerability by submitting crafted YANG XML documents with specific metadata attributes to applications parsing untrusted XML data, causing process crashes or potential code execution.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  VulnCheck
CVSS-B 7.1 HIGH
Vector:  CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/CESNET/libyang/commit/6b5ed47ee674fbe86b31bbebc4ff26889aeff38c VulnCheck
https://github.com/CESNET/libyang/security/advisories/GHSA-9f49-8x56-jmjc CISA-ADP, VulnCheck
https://red.anthropic.com/2026/cvd/findings/ANT-2026-TZQ1KH7E CISA-ADP, VulnCheck
https://www.vulncheck.com/advisories/libyang-heap-use-after-free-write-in-xml-metadata-parsing VulnCheck

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free VulnCheck  

Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-41401
NVD Published Date:
05/26/2026
NVD Last Modified:
07/24/2026
Source:
VulnCheck