Moodle TeX Formula Editor resource consumption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Moodle. This impacts an unknown function of the component TeX Formula Editor. The manipulation results in resource consumption. This vulnerability is reported as CVE-2026-26047. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Moodle (affected version unknown). Affected is an unknown functionality of the component TeX Formula Editor. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

A denial-of-service vulnerability was identified in Moodle’s TeX formula editor. When rendering TeX content using mimetex, insufficient execution time limits could allow specially crafted formulas to consume excessive server resources. An authenticated user could abuse this behavior to degrade performance or cause service interruption.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is traded as CVE-2026-26047. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/27/2026). The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 299831 (Linux Distros Unpatched Vulnerability : CVE-2026-26047), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (299831) and EUVD (EUVD-2026-7527). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / 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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Nessus ID: 299831
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-26047

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/19/2026 Advisory disclosed
02/19/2026 +0 days VulDB entry created
02/27/2026 +8 days VulDB entry last update

Sourcesinfo

Product: moodle.org

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2026-26047 (🔒)
GCVE (CVE): GCVE-0-2026-26047
GCVE (VulDB): GCVE-100-346872
EUVD: 🔒

Entryinfo

Created: 02/19/2026 12:34
Updated: 02/27/2026 13:50
Changes: 02/19/2026 12:34 (49), 02/22/2026 22:50 (12), 02/24/2026 09:07 (2), 02/25/2026 18:07 (1), 02/27/2026 13:50 (1)
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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