CVE-2026-88755: Command Injection (CVSS 7.8)

Description

Z.ai ZCode v3.11.2.6792 was discovered to automatically establish connections with MCP servers declared inside a repository's workspace configuration, possibly allowing attackers to execute arbitrary code via opening a crafted repository.

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CVSS v3.1 Score

7.8

HIGH

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

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

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

CWE-200 CWE-200

CWE-284 CWE-284

CWE-863 Incorrect Authorization

References

Other References

http://zai.com http://zcode.com https://gist.github.com/lkloliver/aac8dcf8a53fc4b3c1b0a5dfbf36ef68 https://github.com/lkloliver/poc/tree/main/CVE-2026-88755

Frequently Asked Questions

What is CVE-2026-88755? +

Z.ai ZCode v3.11.2.6792 was discovered to automatically establish connections with MCP servers declared inside a repository's workspace configuration, possibly allowing attackers to execute arbitrary code via opening a crafted repository. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-88755? +

CVE-2026-88755 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-88755? +

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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