Uncrustify check_template.cpp check_template function/tokenize_cleanup buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Uncrustify. This affects the function check_template function/tokenize_cleanup of the file check_template.cpp. Executing a manipulation can lead to buffer overflow. This vulnerability is tracked as CVE-2026-36189. The attack is restricted to local execution. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical was found in Uncrustify (the affected version unknown). This vulnerability affects the function check_template function/tokenize_cleanup of the file check_template.cpp. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Buffer Overflow vulnerability in Uncrustify Project Affected v.Uncrustify_d-0.82.0-132-bcc41cbdc and Fixed in commit 68e67b9a1435a1bb173b106fedb4a4f510972bdc allows a local attacker to cause a denial of service via the check_template.cpp, check_template function, tokenize_cleanup function, uncrustify executable components

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-36189 since 04/06/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 316607 (Linux Distros Unpatched Vulnerability : CVE-2026-36189), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (316607) and EUVD (EUVD-2026-31287). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 6.2
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 316607
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-36189

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

04/06/2026 CVE reserved
05/21/2026 +45 days Advisory disclosed
05/21/2026 +0 days VulDB entry created
05/26/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-36189 (🔒)
GCVE (CVE): GCVE-0-2026-36189
GCVE (VulDB): GCVE-100-365032
EUVD: 🔒

Entryinfo

Created: 05/21/2026 16:47
Updated: 05/26/2026 02:07
Changes: 05/21/2026 16:47 (54), 05/21/2026 19:47 (1), 05/24/2026 07:54 (11), 05/26/2026 02:07 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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