[NEW] [medium] PHP: Multiple vulnerabilities allow denial of service

mediumCVE-2026-12184 CVE-2026-14355

A remote, anonymous attacker can exploit multiple vulnerabilities in PHP to conduct a denial of service attack.

CSIRTS triage

vendor: PHP product: PHP Denial of serviceOther

What: Multiple vulnerabilities allow denial of service attacks.
Who is affected: Deployments of PHP.
Urgency: Remediation is medium urgency due to the potential for denial of service.
Action: Update to the latest version of PHP.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-14
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2186

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-143550.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-12184	coverage & exploitation status	NVD · CVE.org
CVE-2026-14355	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownUSN-8564-1: PHP vulnerabilitiesubuntu
mediumCVE-2026-14355: ext/openssl: Memory corruption in openssl_encrypt with AES-WRAP-PADmsrc
unknownMultiple vulnerabilities in PHP (July 7, 2026)cert-fr-avis
unknownDSA-6377-1 php8.4 - security updatedebian
mediumCVE-2026-14355: In PHP versions 8.2.* before 8.2.32, 8.3.* before 8.3.32, 8.4.* before 8.4.23, 8.5.* before 8.…nvd

Recent advisories for PHP

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-80138: ClipBucket V5's web installer fails to properly validate or escape the php_cli_filepath parame…nvd · 2026-08-25
unknownCVE-2026-53965: The MCP PHP SDK (Composer package mcp/sdk) is the official Model Context Protocol SDK for PHP.…nvd · 2026-08-25
highCVE-2026-78572: The Kalles Addons plugin for WordPress is vulnerable to PHP Object Injection in all versions u…nvd · 2026-08-25
unknownCVE-2026-77138: The extension fails to safely process untrusted client input of an attacker-controlled cookie …nvd · 2026-08-25
unknownCVE-2026-56095: The extension's indexer passed every field value returned by content object rendering through …nvd · 2026-08-25
highCVE-2026-56702: Adminer versions before 5.4.3 contain an unrestricted file upload vulnerability in the Adminer…nvd · 2026-08-25