Integer overflow in the php_escape_html_entities_ex function in ext/standard/html.c in…
Priority MEDIUM 42CWE-190Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
Integer overflow in the php_escape_html_entities_ex 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 a FILTER_SANITIZE_FULL_SPECIAL_CHARS filter_var call. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-5094.
Why it matters now
EPSS 0.02636 85th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 31
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | up to 5.5.35 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:* | 5.6.0 alpha1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:* | 5.6.0 alpha2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:* | 5.6.0 alpha3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:* | 5.6.0 alpha4 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:* | 5.6.0 alpha5 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:* | 5.6.0 beta1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:* | 5.6.0 beta2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:* | 5.6.0 beta3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:* | 5.6.0 beta4 | Vulnerable | PHP |
- cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions up to 5.5.35 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:* Versions 5.6.0 alpha1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:* Versions 5.6.0 alpha2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:* Versions 5.6.0 alpha3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:* Versions 5.6.0 alpha4 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:* Versions 5.6.0 alpha5 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:* Versions 5.6.0 beta1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:* Versions 5.6.0 beta2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:* Versions 5.6.0 beta3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:* Versions 5.6.0 beta4 Vulnerable ·PHP
Show 21 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:* | 5.6.1 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:* | 5.6.2 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:* | 5.6.3 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:* | 5.6.4 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:* | 5.6.5 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:* | 5.6.6 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:* | 5.6.7 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:* | 5.6.8 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:* | 5.6.9 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:* | 5.6.10 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:* | 5.6.11 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:* | 5.6.12 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.13:*:*:*:*:*:*:* | 5.6.13 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.14:*:*:*:*:*:*:* | 5.6.14 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.15:*:*:*:*:*:*:* | 5.6.15 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.16:*:*:*:*:*:*:* | 5.6.16 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.17:*:*:*:*:*:*:* | 5.6.17 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.18:*:*:*:*:*:*:* | 5.6.18 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.19:*:*:*:*:*:*:* | 5.6.19 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.20:*:*:*:*:*:*:* | 5.6.20 | Vulnerable | PHP |
| cpe:2.3:a:php:php:5.6.21:*:*:*:*:*:*:* | 5.6.21 | Vulnerable | PHP |
- cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:* Versions 5.6.1 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:* Versions 5.6.2 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:* Versions 5.6.3 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:* Versions 5.6.4 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:* Versions 5.6.5 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:* Versions 5.6.6 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:* Versions 5.6.7 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:* Versions 5.6.8 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:* Versions 5.6.9 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:* Versions 5.6.10 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:* Versions 5.6.11 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:* Versions 5.6.12 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.13:*:*:*:*:*:*:* Versions 5.6.13 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.14:*:*:*:*:*:*:* Versions 5.6.14 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.15:*:*:*:*:*:*:* Versions 5.6.15 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.16:*:*:*:*:*:*:* Versions 5.6.16 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.17:*:*:*:*:*:*:* Versions 5.6.17 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.18:*:*:*:*:*:*:* Versions 5.6.18 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.19:*:*:*:*:*:*:* Versions 5.6.19 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.20:*:*:*:*:*:*:* Versions 5.6.20 Vulnerable ·PHP
- cpe:2.3:a:php:php:5.6.21:*:*:*:*:*:*:* Versions 5.6.21 Vulnerable ·PHP
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Software Collections | Affected | No fix planned: Will not fix |
Not affected: 3 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2016-5095
- 2026-10-03 Alias added: GHSA-93jw-q774-wqcf
References
More Php vulnerabilities
- TI-2024-04260 Argument Injection in PHP-CGI KEVCVSS 3.1CRITICAL 9.8
- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2012-01607 sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI… KEVCVSS 3.1CRITICAL 9.8
- TI-2026-78794 PHP remote code execution via stale global state KEVCVSS 4.0CRITICAL 9.2
- TI-2026-78793 Out-of-memory handling flaw in PHP allows remote code execution KEVCVSS 4.0CRITICAL 9.2
- TI-2015-00205 Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and… CVSS 2.0HIGH 10.0
Sources
- CVE-2016-5095 · CVE Program
- CVE-2016-5095 · NVD
- FIRST EPSS
- GHSA-93jw-q774-wqcf · GitHub Advisory Database · CC BY 4.0
- CVE-2016-5095 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences