CVE-2026-26047GHSA-CG8J-5CR2-568QBIT-MOODLE-2026-26047
Moodle: moodle: uncontrolled resource consumption in tex formula editor leading to denial of service
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.5.9, 5.0.5, 5.1.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- moodle
fixed in 4.5.9; From 5.0.0 · fixed in 5.0.5; From 5.1.0 · fixed in 5.1.2
- moodle/moodlePackagist
From 5.1.0-beta · fixed in 5.1.2
- moodle/moodlePackagist
From 5.0.0-beta · fixed in 5.0.5
- moodle/moodlePackagist
fixed in 4.5.9