CVE-2026-27784 | F5 NGINX Open Source ngx_http_mp4_module integer overflow (K000160364)

VDB-352784 · CVE-2026-27784 · K000160364 F5 NGINX OPEN SOURCE NGX_HTTP_MP4_MODULE INTEGER OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.6 $0-$5k 1.17+ Summaryinfo A vulnerability described as critical has been identified in F5 NGINX Open Source. This vulnerability affects the function ngx_http_mp4_module. Such manipulation leads to integer overflow. This vulnerability is traded as CVE-2026-27784. An attack has to be approached locally. There is no exploit available. Upgrading the affected component is recommended. Detailsinfo A vulnerability, which was classified as critical, has been found in F5 NGINX Open Source (unknown version). Affected by this issue is the function ngx_http_mp4_module. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes: The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to over-read or over-write NGINX worker memory resulting in its termination, using a specially crafted MP4 file. The issue only affects 32-bit NGINX Open Source if it is built with the ngx_http_mp4_module module and the mp4 directive is used in the configuration file. Additionally, the attack is possible only if an attacker can trigger the processing of a specially crafted MP4 file with the ngx_http_mp4_module module. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. The advisory is shared for download at my.f5.com. This vulnerability is handled as CVE-2026-27784 since 03/18/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/24/2026). Upgrading eliminates this vulnerability. Productinfo Type Web Server Vendor F5 Name NGINX Open Source License commercial Website Vendor: https://f5.com/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 7.8 VulDB Meta Temp Score: 7.6 VulDB Base Score: 7.8 VulDB Temp Score: 7.5 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.8 CNA Vector: 🔒 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: Integer overflow CWE: CWE-190 / CWE-189 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No 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: 🔒 Timelineinfo 03/18/2026 CVE reserved 03/24/2026 +6 days Advisory disclosed 03/24/2026 +0 days VulDB entry created 03/24/2026 +0 days VulDB entry last update Sourcesinfo Vendor: f5.com Advisory: K000160364 Status: Confirmed CVE: CVE-2026-27784 (🔒) GCVE (CVE): GCVE-0-2026-27784 GCVE (VulDB): GCVE-100-352784 Entryinfo Created: 03/24/2026 16:08 Changes: 03/24/2026 16:08 (74) Complete: 🔍 Cache ID: 99:5C2:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸