CVE-2016-5094

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4.5%CVSS: 8.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Integer overflow in the php_html_entities function in ext/standard/html.c in PHP before 5.5.36 and 5.6.x before 5.6.22 allows remote attackers to cause a denial of service or possibly have unspecified other impact by triggering a large output string from the htmlspecialchars function.

CVSS v3
8.6
EG Score
8.6HIGHmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation5% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
4.5%
EPSS %ILE
91st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 7, 2016

Last Modified

June 17, 2026

Advisory Details (8)

Auto-updated Sep 1, 2026
Patch available. Sources: github_commit.
generic
http://rhn.redhat.com/errata/RHSA-2016-2750.html
generic

PHP: PHP 5 ChangeLog

http://php.net/ChangeLog-5.php
generic
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
github_commit Patch Available

commit 0da8b8b801f9 (php/php-src)

Patch available: php/php-src php-8.5.1 (contains commit 0da8b8b801f9)

https://github.com/php/php-src/commit/0da8b8b801f9276359262f1ef8274c7812d3dfda?w=1
generic

PHP :: Sec Bug #72135 :: Integer Overflow in php_html_entities()

https://bugs.php.net/bug.php?id=72135
generic

CVE-2016-5094 - PSIRT.COM

http://www.securityfocus.com/bid/90857
generic

oss-security - Re: Fwd: CVE for PHP 5.5.36 issues

http://www.openwall.com/lists/oss-security/2016/05/26/3
generic

[SECURITY] [DSA 3602-1] php5 security update

http://www.debian.org/security/2016/dsa-3602

Vendor Advisories for CVE-2016-5094(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuphp5-fpm (5.3.10-1ubuntu3.24) @ precise2026-05-22ubuntu
redhatrh-php56-php-pear-1:1.9.5-4.el72016-11-15redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 2 ecosystems)
Debian:7(1)
PackageVulnerable rangeFix by version rangeDependents
php55.4.11-1 ... 5.4.9-4 (38 versions)
  • every version up to 5.4.45-0+deb7u4: fixed in 5.4.45-0+deb7u4
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
php55.6.11+dfsg-1 ... 5.6.9+dfsg-1 (27 versions)
  • every version up to 5.6.22+dfsg-0+deb8u1: fixed in 5.6.22+dfsg-0+deb8u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

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.

Data Freshness Timeline

(refreshed 6× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 154 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2016-5094?
CVE-2016-5094 is a high vulnerability published on August 7, 2016. Integer overflow in the phphtmlentities function in ext/standard/html.c in PHP before 5.5.36 and 5.6.x before 5.6.22 allows remote attackers to cause a denial of service or possibly have unspecified other impact by triggering a large output string from the htmlspecialchars function.
When was CVE-2016-5094 disclosed?
CVE-2016-5094 was first published on August 7, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-5094 actively exploited?
CVE-2016-5094 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.5% probability of exploitation in the next 30 days (91st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-5094?
CVE-2016-5094 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2016-5094?
A fix for CVE-2016-5094 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2016-5094 are linked in the Vendor Advisories panel on this page.

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