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MISP-related products were flagged for a vulnerability affecting website routes used to query external MISP instances, and CERT-PY published an advisory warning organizations about the issue. The exposed functionality involved the /fetch_misp_event and /misp_search_events endpoints, which could be reached without authentication and interacted with remote MISP servers, creating risk around unauthorized use and server-side request handling.
A corresponding code change in MISP/cti-transmute hardened those routes by adding authentication requirements and stricter validation of external MISP URLs. The patch now resolves hostnames to all associated IP addresses and rejects targets if any address is not globally routable, blocking access to private, loopback, link-local, or reserved destinations and reducing SSRF exposure through DNS names; project notes also state that while DNS rebinding or post-validation DNS changes may still allow limited probing, response bodies remain constrained by TLS hostname validation and disabled redirects.
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1 event from the most recent confirmed update back to the earliest known activity.
A code change in MISP/cti-transmute updated MISP URL validation to resolve hostnames and reject non-global IP destinations, and added authentication requirements to the `/fetch_misp_event` and `/misp_search_events` routes. The patch was recorded in commit `4d29109`.
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A high-severity server-side request forgery flaw tracked as **`CVE-2026-73160`** was disclosed in MISP's **cti-transmute** component, affecting the **`/fetch_misp_event`** and **`/misp_search_events`** endpoints. The issue stemmed from validation that blocked direct private or reserved IP literals but still accepted ordinary hostnames without resolving them first, allowing an unauthenticated attacker to supply a domain that resolved to an internal address and force the server to send requests into its internal network and return the responses. The vulnerability is rated **CVSS 4.0 8.7 (High)** and is mapped to **`CWE-918`**. MISP addressed the flaw by updating URL validation to resolve hostnames with **`socket.getaddrinfo()`** and reject targets if any resolved address is not globally routable, covering private, loopback, link-local, and reserved destinations. The fix also added **login protection** to both affected routes, reducing exposure of functionality that queries external MISP instances. Project notes indicate some residual DNS rebinding or post-validation DNS swap risk may remain for limited probing, but response-body exposure is constrained because valid TLS certificates are required for the hostname and redirects are not followed.
Aug 11, 2026
The Canadian Centre for Cyber Security warned that **MISP CTI-Transmute** versions `<= 1.4.0` are affected by multiple vulnerabilities, including **CVE-2026-69082** and **CVE-2026-69079`. One flaw allows **cross-site request forgery (CSRF)** against the administrative user-deletion endpoint because `/account/delete/<id>` accepted HTTP `GET` requests for a state-changing action, letting an attacker trick a logged-in administrator into deleting a chosen user account. The issue could cause unauthorized state changes, denial of access for affected users, and potential disruption if administrator accounts are targeted. A second high-severity flaw allows **unauthenticated denial of service** through the `/activity_timeline` endpoint, where an unbounded `days` parameter could be abused to force excessive database, CPU, and memory consumption and degrade site availability. The advisory also referenced remediation for blocking file and network fetches during evaluation PDF rendering, alongside fixes that cap the timeline range and require `POST` plus CSRF protection for user deletion. Administrators were urged to review the linked fixes and apply updates as they become available.
Aug 4, 2026
MISP Project released **CTI-Transmute 1.5** with 16 security fixes affecting versions `1.4` and earlier, including four **High** severity flaws. The most serious issues include unauthenticated HTML injection in PDF export that could lead to local file and internal URL access, CSRF that could let an attacker delete administrator accounts, unauthenticated SSRF in remote-MISP fetch routes, and an unauthenticated denial-of-service condition caused by an unbounded activity timeline parameter. Users were urged to upgrade promptly and review release notes because the update also introduces database schema renames, automatic migrations, and HTTP method changes that may affect existing integrations. The release also adds broader hardening measures and platform changes beyond the vulnerability fixes. MISP said version 1.5 introduces a nonce-based **Content Security Policy**, hardened session cookies, safer PDF rendering, resolved-IP validation for remote fetches, and conversion of state-changing `GET` routes to `POST` or `DELETE` with CSRF protection. The update further adds a first-class public API for the conversion catalogue, typed converter parameters, architectural refactoring around a converter registry and service separation, and an expanded automated test suite reaching 516 tests.
Aug 11, 2026