CVE-2026-35196

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 50% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an OS Command Injection vulnerability exists in the main/inc/ajax/gradebook.ajax.php endpoint within the export_all_certificates action, where the course code retrieved from the session variable $_SESSION['_cid'] via api_get_course_id() is concatenated directly into a shell_exec() command string without sanitization or escaping using escapeshellarg(). If an attacker can manipulate or poison their session data to inject shell metacharacters into the _cid variable, they can achieve arbitrary command execution on the underlying server. Successful exploitation grants full access to read system files and credentials, alters the application and database, or disrupts server availability. This issue has been fixed in version 2.0.0-RC.3.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
75.4%
KEV
Not listed

Published

April 14, 2026

Last Modified

April 22, 2026

Advisory Details (3)

Auto-updated May 2, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

OS Command Injection on Chamilo LMS · Advisory · chamilo/chamilo-lms · GitHub

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-crc6-r6c7-44q3
generic

Release v2.0.0 RC 3 · chamilo/chamilo-lms · GitHub

https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3
generic

Security: Sanitize shell command inputs using `escapeshellarg` to pre… · chamilo/chamilo-lms@62671e5 · GitHub

https://github.com/chamilo/chamilo-lms/commit/62671e5e268f235cddfba704edee90f35c234df1

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

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Frequently asked(5)

What is CVE-2026-35196?
CVE-2026-35196 is a high vulnerability published on April 14, 2026. Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an OS Command Injection vulnerability exists in the main/inc/ajax/gradebook.ajax.php endpoint within the exportallcertificates action, where the course code retrieved from the session variable $SESSION['cid']…
When was CVE-2026-35196 disclosed?
CVE-2026-35196 was first published in the National Vulnerability Database on April 14, 2026, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35196 actively exploited?
CVE-2026-35196 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35196?
CVE-2026-35196 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-35196?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35196, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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