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No exploitation reportedFix available

CVE-2026-26046

No exploitation reported by the sources we read.

  • Published2026-02-21
  • Fixed in5.1.2 · 5.0.5 · 4.5.9
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability was found in a Moodle TeX filter administrative setting where insufficient sanitization of configuration input could allow command injection. On sites where the TeX filter is enabled and ImageMagick is installed, a maliciously crafted setting value entered by an administrator could result in unintended system command execution. While exploitation requires administrative privileges, successful compromise could affect the entire Moodle server.

Timeline

dates in UTC
  1. 2026-02-2106:17CVE publishedNVD
  2. 2026-10-2523:12EPSS crossed 10 %FIRST EPSS

Versions per branch

NVD · OSV
Moodle
BranchAffectedFixed in
5.1≥ 5.1.0, < 5.1.25.1.2
5.0≥ 5.0.0, < 5.0.55.0.5
4.5< 4.5.94.5.9

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As fedora, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • moodleother versions: not affected

    https://github.com/moodle/moodle

    Affected
    • < 4.5.9fixed in 4.5.9semver
    • ≥ 5.0.0, < 5.0.5fixed in 5.0.5semver
    • ≥ 5.1.0, < 5.1.2fixed in 5.1.2semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-02-21

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • moodleUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • moodleUbuntu:Pro:16.04:LTSall versions · no fixed version listed

Vendor advisories

  • CVE-2026-26046 Red Hat Product Security

    moodle: Moodle: Improper Input Sanitization in TeX Filter Administration Setting

Full record on NVD

Fix

  1. Update Moodle to 5.1.2 · 5.0.5 · 4.5.9

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-02-24
  • CNACVSS 3.17.2known since 2026-10-23
  • CNAweakness (CWE)CWE-78known since 2026-10-23
  • FIRST EPSSEPSS score13.8 %read 2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2026-02-21
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-4g4j-v56v-2w79

Frequently asked questions

What is CVE-2026-26046?

A vulnerability was found in a Moodle TeX filter administrative setting where insufficient sanitization of configuration input could allow command injection. On sites where the TeX filter is enabled and ImageMagick is installed, a maliciously crafted setting value entered by an administrator could result in unintended system command execution. While exploitation requires administrative privileges, successful compromise could affect the entire Moodle server.

Is CVE-2026-26046 actively exploited?

Active exploitation of CVE-2026-26046 has not been confirmed. Its EPSS score was 13.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-26046?

CVE-2026-26046 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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