SecuriTricks - CVE-2026-56132

Description

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

Product(s) Impacted

Vendor	Product	Versions
Libexpat	Libexpat	<2.8.2

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-821

Incorrect Synchronization

The product utilizes a shared resource in a concurrent manner, but it does not correctly synchronize access to the resource.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	libexpat	libexpat	<2.8.2	/	/	/	/	/	/	/

References

https://github.com/libexpat/libexpat/pull/1272

CVSS Score

6.9 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: HIGH
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: LOW

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

View Vector String

Timeline

Published: June 19, 2026, 6:17 a.m.
Last Modified: June 19, 2026, 6:17 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-56132