Document Foundation LibreOffice up to 26.2.4 PDF Import heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00+

Summaryinfo

A vulnerability, which was classified as critical, was found in Document Foundation LibreOffice up to 26.2.4. This affects an unknown part of the component PDF Import. Such manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2026-63274. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Document Foundation LibreOffice up to 26.2.4. It has been rated as critical. Affected by this issue is some unknown functionality of the component PDF Import. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object. The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.

The advisory is available at libreoffice.org. This vulnerability is handled as CVE-2026-63274 since 07/16/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

It is declared as proof-of-concept.

Upgrading to version 26.2.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-84354). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: LibreOffice 26.2.5

Timelineinfo

07/16/2026 CVE reserved
09/22/2026 +68 days Advisory disclosed
09/22/2026 +0 days VulDB entry created
09/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: libreoffice.org
Status: Confirmed

CVE: CVE-2026-63274 (🔒)
GCVE (CVE): GCVE-0-2026-63274
GCVE (VulDB): GCVE-100-408410
EUVD: 🔒

Entryinfo

Created: 09/22/2026 13:44
Updated: 09/22/2026 15:37
Changes: 09/22/2026 13:44 (68), 09/22/2026 15:37 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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