CVE-2026-33249 | nats-io nats-server up to 2.11.14/2.12.5 authorization (GHSA-8m2x-3m6q-6w8j)

VDB-353506 · CVE-2026-33249 · GHSA-8M2X-3M6Q-6W8J NATS-IO NATS-SERVER UP TO 2.11.14/2.12.5 AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.2 $0-$5k 2.45+ Summaryinfo A vulnerability was found in nats-io nats-server up to 2.11.14/2.12.5. It has been declared as problematic. Affected is an unknown function. Executing a manipulation can lead to authorization. This vulnerability is handled as CVE-2026-33249. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability has been found in nats-io nats-server up to 2.11.14/2.12.5 and classified as problematic. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect integrity. CVE summarizes: NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the trace messages can be sent to an arbitrary valid subject, including those to which the client does not have publish permission. The payload is a valid trace message and not chosen by the attacker. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available. The advisory is available at github.com. This vulnerability was named CVE-2026-33249 since 03/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. Upgrading to version 2.11.15 or 2.12.6 eliminates this vulnerability. Productinfo Vendor nats-io Name nats-server Version 2.11.0 2.11.1 2.11.2 2.11.3 2.11.4 2.11.5 2.11.6 2.11.7 2.11.8 2.11.9 2.11.10 2.11.11 2.11.12 2.11.13 2.11.14 2.12.0 2.12.1 2.12.2 2.12.3 2.12.4 2.12.5 Website Product: https://github.com/nats-io/nats-server/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.2 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 4.3 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authorization CWE: CWE-863 / CWE-285 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: nats-server 2.11.15/2.12.6 Timelineinfo 03/18/2026 CVE reserved 03/25/2026 +7 days Advisory disclosed 03/25/2026 +0 days VulDB entry created 03/25/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-8m2x-3m6q-6w8j Status: Confirmed CVE: CVE-2026-33249 (🔒) GCVE (CVE): GCVE-0-2026-33249 GCVE (VulDB): GCVE-100-353506 Entryinfo Created: 03/25/2026 23:02 Changes: 03/25/2026 23:02 (63) Complete: 🔍 Cache ID: 99:7F6:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸