mlc-ai xgrammar up to 0.1.20 recursion

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in mlc-ai xgrammar up to 0.1.20 and classified as problematic. Affected by this vulnerability is an unknown functionality. Performing a manipulation results in recursion. This vulnerability is reported as CVE-2025-57809. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in mlc-ai xgrammar up to 0.1.20. It has been classified as problematic. This affects an unknown part. The manipulation with an unknown input leads to a recursion vulnerability. CWE is classifying the issue as CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. This is going to have an impact on availability. The summary by CVE is:

XGrammar is an open-source library for efficient, flexible, and portable structured generation. Prior to version 0.1.21, XGrammar has an infinite recursion issue in the grammar. This issue has been resolved in version 0.1.21.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-57809 since 08/20/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 0.1.21 eliminates this vulnerability. Applying the patch b943feacb5a1caf4d39de8ec3bf7c7ce066dcee5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

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: 6.4
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Recursion
CWE: CWE-674 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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: xgrammar 0.1.21
Patch: b943feacb5a1caf4d39de8ec3bf7c7ce066dcee5

Timelineinfo

08/20/2025 CVE reserved
08/26/2025 +6 days Advisory disclosed
08/26/2025 +0 days VulDB entry created
09/10/2025 +14 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 250
Status: Confirmed

CVE: CVE-2025-57809 (🔒)
GCVE (CVE): GCVE-0-2025-57809
GCVE (VulDB): GCVE-100-321387

Entryinfo

Created: 08/26/2025 04:44
Updated: 09/10/2025 00:07
Changes: 08/26/2025 04:44 (69), 08/26/2025 10:44 (1), 09/10/2025 00:07 (12)
Complete: 🔍
Cache ID: 216::103

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