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Palo Alto Networks

PHP Memory Corruption Vulnerability

CVE-2026-109618

What this means

This is rated critical severity (9.2 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Php Php, Siemens Ruggedcom ape1808 Firmware and Siemens Ruggedcom ape1808, and 1 more are in your estate, and treat that as the priority.

Full vendor description

PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave request memory in an uninitialized state before performing an allocation. The subsequent request cleanup procedure may read or branch on this memory. Multiple OOM strategies can consistently trigger this condition and lead to remote code execution (RCE).

Scoring and exploitation

9.2/ 10
CVSS 4.0 base scoreCritical

Exploitable over the network without any account, under specific conditions, and no one has to click or open anything. High impact on confidentiality, integrity and availability.

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploitability

Longer bar: easier to attack

Attack vectorNetworkAV:N
Attack complexityHighAC:H
Attack requirementsPresentAT:P
Privileges requiredNonePR:N
User interactionNoneUI:N

Impact

Longer bar: more harm

ConfidentialityHighVC:H
IntegrityHighVI:H
AvailabilityHighVA:H
Elevated attack likelihood (~100% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
Exploited in the wild
Yes — confirmed exploitation (US CISA )
Not reported
Listed product
PHP Group PHP

Weaknesses

CWE-416CWE-755CWE-824CWE-1325

Affected products ()

  • Php Php
  • Siemens Ruggedcom ape1808 Firmware
  • Siemens Ruggedcom ape1808
  • Paloaltonetworks Pan Os
Show the raw CPE strings (40)
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:-:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h1:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h10:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h11:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h12:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h13:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h14:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h15:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h16:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h17:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h18:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h19:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h2:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h20:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h21:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h22:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h23:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h24:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h3:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h32:*:*:*:*:*:*
  • cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h34:*:*:*:*:*:*

Showing 25 of 40 matches from .

References

11 links from the CVE record, grouped by site; the vendor's advisory comes first.

Related feed events

  • Rapid Response: php2shell, Leaked Critical PHP Vulnerabilities (CVE-2026-109618 & CVE-2026-109619)

    Type Vulnerability

    A PHP memory corruption vulnerability is reported, involving two CVEs, with one confirmed as exploited in the wild. Known-exploited catalogue reports exploitation in the wild.

    Next step: Confirm whether PHP is in your estate.

    Who's reporting

    Official authority missing. no OfficialVendor statement missing. no VendorResearcher coverage missing. no Researcher

    No corroborated perspectives yet. Treat claims cautiously.

    PHPPalo Alto Networks PAN-OSPHP Group PHP
    CVE-2026-109618+1

  • PHP Memory Corruption Vulnerability

    Type Vulnerability

    CISA has added two new vulnerabilities to its known-exploited catalogue and updated the CVE-2026-109618 is confirmed as exploited in the wild (US known-exploited catalogue) CVE-2026-109618 has an…

    Next step: Confirm whether PHP is in your estate.

    PHPPalo Alto Networks PAN-OSPHP Group PHP
    CVE-2026-109618+1

  • Responding to core PHP vulnerabilities CVE-2026-109618 and CVE-2026-109619

    Type Vulnerability

    Google Cloud CVE-2026-109618 has an estimated ~100% chance of attack in 30 days (100th percentile) as of 2026-10-26…

    Who's reporting

    Official authority missing. no OfficialVendor statement missing. no VendorResearcher coverage missing. no Researcher

    No corroborated perspectives yet. Treat claims cautiously.

    PHPPalo Alto Networks PAN-OS
    CVE-2026-109618+1