Security readout for executives and security teams
Plain-English summary
CVE-2026-26046 is a Moodle issue where an administrator-entered TeX filter setting may be insufficiently sanitized. If TeX filtering is enabled and ImageMagick is installed, a malicious admin-level configuration value could execute system commands on the Moodle server. This is serious, but it requires high privileges.
Executive priority
Treat as a high-priority hardening and patch-tracking item for Moodle environments. It is not described as actively exploited, but successful abuse could compromise the whole Moodle server if an admin account is misused or compromised.
Technical view
The issue is CWE-78 command injection in a Moodle TeX filter administrative setting. CVSS 3.1 is 7.2 high: network-reachable, low complexity, high privileges required, no user interaction, with high confidentiality, integrity, and availability impact. Public data identifies Moodle versions 5.0.0 and 5.1.0 in the affected range, but fixed versions are not provided.
Likely exposure
Exposure is most likely on Moodle sites using the TeX filter with ImageMagick installed. Risk is lower where the filter is disabled, ImageMagick is absent, or administrator access is tightly controlled. The source data does not identify affected hosting models or distributions beyond Moodle package references.
Exploitation context
The source bundle does not report active exploitation, and KEV status is false. Exploitation requires administrative privileges, so the main concern is malicious, compromised, or over-privileged admin accounts converting configuration access into full server compromise.
Researcher notes
Public details are limited. The affected-version data includes Moodle 5.0.0 and 5.1.0, with no fixed release named in the supplied sources. Avoid assuming exploit availability. Focus validation on TeX filter status, ImageMagick presence, administrator access controls, and vendor advisory updates.
Mitigation direction
- Check Moodle and distribution vendor advisories for fixed versions or configuration guidance.
- Restrict Moodle administrator access to trusted accounts only.
- Disable the TeX filter if it is not required.
- Review whether ImageMagick is installed and needed on Moodle servers.
- Apply vendor-provided updates when available.
Validation and detection
- Identify Moodle instances and versions, especially 5.0.0 and 5.1.0.
- Confirm whether the TeX filter is enabled.
- Confirm whether ImageMagick is installed on affected servers.
- Review recent administrative setting changes for the TeX filter.
- Verify vendor advisory status for patches or mitigations.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-26046 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2026-26046CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2440903CVE reference · issue-tracking, x_refsource_REDHAT
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.