CVE-2026-49131
Medium · CVSS 5.1Published 2026-08-03
CVSS
5.1
Medium
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-49131?
OPNsense before 26.1.9 contains a stored cross-site scripting vulnerability that allows authenticated attackers with firewall rule management privileges to inject arbitrary HTML or JavaScript by embedding payloads in the firewall rule description field via the filter API endpoint. The unsanitized description value is persisted and later rendered through the default cell formatter in opnsense_bootgrid.js, which assigns raw cell content to innerHTML, causing injected scripts to execute in the browser of any authenticated user who views the Firewall Rules page, enabling session hijacking or credential theft.
CVSS Score Explained
CVSS 5.1 is Medium severity. Exploitation usually requires some specific conditions (local access, user interaction, or a particular config). Still worth patching in your next maintenance window.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- PATCHhttps://docs.opnsense.org/releases/CE_26.1.html#june-02-2026
- ›https://github.com/opnsense/core/commit/b11d6b340716e240868ab19a369e058a46f0876f
- ›https://www.vulncheck.com/advisories/opnsense-stored-xss-via-firewall-rule-description-field
Track vulnerabilities for your stack
Tell us what tech you run — Node.js, Python, Java, nginx, whatever — and get a weekly email when new CVEs affect it.
Recent CVEs
- CVE-2026-67673A stack-based buffer overflow vulnerability exists in the cmd_edl function of OreSat Firmware v1.0. The vulnerability is triggered when processing the edl fw_flash command, where the <filename> argument is copied to a 64-byte stack buffer via memcpy without proper length validation. An attacker with physical access to the UART3 serial interface can exploit this vulnerability by sending a maliciously crafted command with an oversized filename parameter,—
- CVE-2026-67978An issue in the SBN UDP interface of NASA cFS v7.0.1 allows attackers to cause a Denial of Service (DoS) via transmitting a crafted SBN frame.—
- CVE-2026-48323Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements Used in a Template Engine vulnerability that could result in arbitrary code execution in the context of the current user. An attacker could exploit this vulnerability to execute arbitrary code. Exploitation of this issue does not require user interaction. Scope is changed.10.0
- CVE-2026-48326Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability that could result in arbitrary code execution in the context of the current user. A low-privileged attacker could exploit this vulnerability to execute arbitrary code. Exploitation of this issue does not require user interaction. Scope is changed.9.9
- CVE-2026-48330Adobe Campaign Classic (ACC) is affected by an Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability that could result in arbitrary code execution in the context of the current user. An attacker could exploit this vulnerability to execute arbitrary SQL commands, potentially gaining elevated access or control over the application. Exploitation of this issue does not require user interaction. Scope is changed.10.0
- CVE-2026-48331Adobe Campaign Classic (ACC) is affected by a Server-Side Request Forgery (SSRF) vulnerability that could result in privilege escalation. Exploitation of this issue does not require user interaction. Scope is changed.10.0