Dynamic Memory Allocation Vulnerability in Expat by Libexpat
CVE-2025-59375

7.5HIGH

Key Information:

Vendor

Libexpat Project

Status
Libexpat
Vendor
CVE Published:
15 September 2025

What is CVE-2025-59375?

The Expat library, used for parsing XML, is susceptible to vulnerabilities that allow attackers to initiate large dynamic memory allocations by sending crafted small documents for parsing. This flaw can lead to significant memory consumption and potentially disrupt service availability. Users of Expat versions before 2.7.2 should take immediate steps to update their software to mitigate this issue.

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Deploy the Patch

Affected Version(s)

libexpat 0 < 2.7.2

References

https://github.com/libexpat/libexpat/issues/1018
https://github.com/libexpat/libexpat/pull/1034
https://github.com/libexpat/libexpat/blob/676a4c531ec7687...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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