Vulnary
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Critical· 9.1

CVE-2025-49796

A flaw in libxml2 can corrupt memory when parsing certain XML elements. An attacker can send a crafted file to crash the library, causing a denial of service or other unpredictable behavior.

publishedJun 16, 2025
last modifiedAug 2, 2026
sourcesNVD
severity · cvss
9.1
critical · how bad it is
exploitation · epss
2%
72th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 2, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

Systems that use the libxml2 library, such as web servers, content management systems, and other applications that parse XML, are potentially affected. The specific versions are not listed, so any installation of libxml2 that processes XML may be vulnerable.

02

Real-world impact

An attacker could send a malicious XML file to a system that uses libxml2, causing the library to crash or corrupt memory. This can lead to a denial of service or potentially allow the attacker to execute arbitrary code if the corruption is exploited.

03

Why this severity

The CVSS score of 9.1 reflects that the vulnerability can be exploited remotely without authentication or user interaction, and it has a high impact on integrity and availability. Because it can crash the library or corrupt memory, it can bring down services or expose sensitive data.

04

What to do about it

no official fix yet

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources

05

Timeline

  1. Jun 16, 2025 · Jun 16, 2025
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Aug 2, 2026 · 3d ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactNone
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →