Event Monitor Cyber
EM-20261029-S1FJ VulnerabilityHigh severity

PHP Memory Corruption Vulnerability

CVE-2026-109618 · PHP Group PHP

21 hours from first report to confirmed exploitation.

Status
Confirmed

Since : CISA added it to Known Exploited Vulnerabilities.

First Signal
Oct 28 12:00 UTCC1 CISA Known Exploited Vulnerabilities
Page Born
Oct 29 08:40 UTCsecond source joined
Last Signal
Oct 30 16:46 UTC5 days before snapshot
Sources
53 official · 2 research, news or crowd
Open For
7 daysso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing
    New signals join; severity can move.
  3. 3
    Confirmed · Now
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The address and ID never change. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Oct 21 14:17 UTC
    C6 NVD published
  2. Scored: reached
    Oct 21 14:17 UTC
    CVSS 9.2 · EPSS 100.0%
  3. Exploited: reached
    Oct 29 08:40 UTC
    C1 CISA KEV, fix by 2026-10-29
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: reached
    Oct 29 23:54 UTC
    C45 published
  6. Resolved: not yet
    Not yet
    When fixed: KEV deadline 2026-10-29, then 14 quiet days

Timeline

12:00Oct 2912:00Oct 3012:00Oct 31BornC1 CISA Known Exploited VulnerabilitC123 Provider status pages (StatuspaC143 Palo Alto Unit 42C45 Palo Alto Networks Security AdviC56 AlienVault OTX pulses

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. PHP2Shell One Week Later: Honeypot Shell on the Web, a Path to Root on Palo Alto Firewall (opens source in a new tab) PHP2Shell emerged from two critical PHP memory-safety vulnerabilities, CVE-2026-109618 and CVE-2026-109619, rated CVSS 9.2 and patched on October 21, 2026. Investigation of open directories uncovered 616 PHP2Shell-relate… Med severityResearch & NewsC56 AlienVault OTX pulses
  2. CVE-2026-109618 Impact of Critical Vulnerabilitie in PHP (CVE-2026-109618, CVE-2026-109619) on Palo Alto Network Product (Severity: CRITICAL) (opens source in a new tab) High severityVendorC45 Palo Alto Networks Security Advisories
  3. Threat Brief: Critical Vulnerabilitie in PHP: CVE-2026-109618, CVE-2026-109619 (Updated October 29) (opens source in a new tab) CVE-2026-109618 and CVE-2026-109619 are Critical vulnerabilities in PHP, a scripting language used globally for web servers and CMS systems. The post Threat Brief: Critical Vulnerabilities in PHP: CVE-2026-109618, CVE-20… Med severityResearch & NewsC143 Palo Alto Unit 42
  4. Linode: Cu tomer Security Advi ory: PHP Remote Code Execution Vulnerabilitie (opens source in a new tab) postmortem. On October 10, 2026, Akamai became aware of two zero-day remote code execution \(RCE\) vulnerabilities affecting the PHP core engine, tracked as CVE-2026-109618 and CVE-2026-109619. Akamai began a platform-wi… Info severityProvider StatusC123 Provider status pages (Statuspage)
  5. CVE-2026-46300 added to KEV: Linux Kernel Mi ing Initialization of a Variable Vulnerability (opens source in a new tab) Linux Kernel contains a missing initialization of a variable vulnerability that could allow for unintended modification of page-cache-backed data via failure to preserve the shared-fragment marker during socket buffer co… High severityExploited ListC1 CISA Known Exploited Vulnerabilities