CVE-2026-27784

MEDIUMNVD 5.57.8▲
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-03-24. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:github_m, ghsa
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
5.5
EG Score
7.8(medium)
EPSS
59.7%
KEV
Not listed

Published

March 24, 2026

Last Modified

June 30, 2026

References (19)

Vendor Advisories for CVE-2026-27784(7)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Additional Vendor Advisories

(11)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Frequently asked(5)

What is CVE-2026-27784?
CVE-2026-27784 is a medium vulnerability published on March 24, 2026. The 32-bit implementation of NGINX Open Source has a vulnerability in the ngxhttpmp4module 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…
When was CVE-2026-27784 disclosed?
CVE-2026-27784 was first published in the National Vulnerability Database on March 24, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27784 actively exploited?
CVE-2026-27784 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-27784?
CVE-2026-27784 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.8.
How do I remediate CVE-2026-27784?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27784, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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