CVE-2026-97863
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
The cisco_firesight_manager_ACL_rule_export module in misp-modules generates a shell script (.sh) that authenticates to and calls the Cisco fireSIGHT Manager API. The module interpolates configuration values (IP address, login, password, domain ID, policy ID) and MISP attribute values (destination IPs, URLs, event info comments) directly into single-quoted shell string assignments without any escaping or sanitization. Because the values are placed inside single-quoted shell strings, any value containing a single-quote character breaks out of the quoting context, allowing an attacker to inject arbitrary shell commands into the exported script. A security analyst who executes the generated .sh file unmodified would run the injected commands with their own privileges, potentially exposing fireSIGHT Manager credentials, modifying ACL rules, or compromising the analyst workstation. Additionally, the module contained a secondary defect where the variable 'config' was only assigned inside a conditional block but referenced unconditionally afterward, causing a NameError (denial of service) when the request payload lacked a 'config' key.
Risk Assessment
An attacker with MISP event-submission privileges can inject malicious commands into the exported script, which will be executed by the analyst, leading to credential theft, ACL rule modification, or workstation compromise.
Recommendation
Update misp-modules to a version containing the fix, and until then, do not execute generated scripts without prior verification or apply proper escaping of values.
Other vulnerabilities in misp-modules
See all- CVE-2026-44364Critical
In versions 3.0.7 and earlier, there is a Cross-Site Request Forgery (CSRF) vulnerability in MISP Modules that allows an attacker to cause an authenticated user to submit unintended requests to the home endpoint. The issue was due to the home blueprint being exempted from CSRF protection.
- CVE-2026-112991Medium
The html_to_markdown expansion module in MISP Modules contains a server-side request forgery (SSRF) vulnerability in its is_safe_url() URL validation function. The BLOCKED_RANGES list was incomplete and omitted 0.0.0.0/8, 100.64.0.0/10, ::/128, fc00::/7, and fe80::/10, as well as IPv4-mapped IPv6 forms, allowing an authenticated user to direct requests to internal addresses from the MISP server's network context.
- CVE-2026-62143High
A Server-Side Request Forgery (SSRF) protection bypass was found in the html_to_markdown expansion module of misp-modules. IPv4-mapped IPv6 addresses were not normalized before blocked-range checks, allowing attacks on loopback, internal, or link-local networks.
- CVE-2026-44363Medium
MISP modules are autonomous modules that can be used to extend MISP for new services. Prior to 3.0.7, an unsafe remote resource fetching vulnerability existed in MISP Modules expansion modules. The html_to_markdown module accepted arbitrary HTTP(S) URLs without sufficient validation, which could allow Server-Side Request Forgery against loopback, private, or link-local network resources. Additionally, the qrcode module disabled TLS certificate verification when retrieving remote images, exposing requests to potential man-in-the-middle interception or response tampering.
Original NVD description (English source)
The cisco_firesight_manager_ACL_rule_export module in misp-modules generates a shell script (.sh) that authenticates to and calls the Cisco fireSIGHT Manager API. The module interpolates configuration values (IP address, login, password, domain ID, policy ID) and MISP attribute values (destination IPs, URLs, event info comments) directly into single-quoted shell string assignments without any escaping or sanitization. Because the values are placed inside single-quoted shell strings, any value containing a single-quote character (e.g., a crafted ip-dst or url attribute value submitted to MISP) breaks out of the quoting context, allowing an attacker to inject arbitrary shell commands into the exported script. A security analyst who subsequently executes the generated .sh file unmodified would run the injected commands with their own privileges, potentially exposing fireSIGHT Manager credentials, modifying ACL rules, or compromising the analyst workstation. Additionally, the module contained a secondary defect where the variable 'config' was only assigned inside a conditional block but referenced unconditionally afterward, causing a NameError (denial of service) when the request payload lacked a 'config' key. The vulnerability requires the attacker to have the ability to submit MISP events or attributes containing a single-quote character and the victim to execute the exported script. No authentication bypass is required beyond standard MISP event-submission privileges.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS