CVE-2026-126042: Command Injection (CVSS 7)

Description

VNote 3.11.0 before 4.12.0 contains an OS command injection vulnerability in its Tasks feature: magic variables such as ${bufferName} and ${selectedText} are substituted into a shell command string without escaping. Attackers can share a notebook containing a note whose filename or text includes shell metacharacters such as $(...), backticks, ; or |, executing commands as the victim when they run a task referencing these variables.

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CVSS v3.1 Score

7.0

HIGH

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0068

Probability of exploitation

0.53%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-78 OS Command Injection

References

Other References

https://github.com/vnotex/vnote/blob/551dfd86b73ce6d93e5403296b069219cb668dc2/src/core/services/shellexecution.cpp#L50-L56 https://github.com/vnotex/vnote/blob/551dfd86b73ce6d93e5403296b069219cb668dc2/src/core/services/shellexecution.cpp#L8-L24 https://github.com/vnotex/vnote/commit/0f5edd837d233a929d2a514a0e718d5d19c93918 https://github.com/vnotex/vnote/releases/tag/v4.12.0 https://r3vpwnx.space/research/vnote-tasks-cmdinjection/ https://www.vulncheck.com/advisories/vnote-3.11.0-before-4.12.0-os-command-injection-via-tasks-magic-variables

Frequently Asked Questions

What is CVE-2026-126042? +

VNote 3.11.0 before 4.12.0 contains an OS command injection vulnerability in its Tasks feature: magic variables such as ${bufferName} and ${selectedText} are substituted into a shell command string without escaping. Attackers can share a notebook containing a note whose filename or text includes shell metacharacters such as $(...), backticks, ; or |, executing commands as the victim when they run a task referencing these variables. It has a CVSS v3.1 base score of 7.0 (HIGH).

How severe is CVE-2026-126042? +

CVE-2026-126042 has a CVSS v3.1 score of 7.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0068, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-126042? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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