CVE.org (no NVD analysis yet)· CNA php

CVE-2026-109618: RCE via OOM corruption

CriticalCVSS 9.2 · v4.0KEVWeaponized Fix available

Noroxi assessment

Priority: Now (action score 96/100)

CISA has confirmed exploitation in the wild (Oct 26, 2026). Remediation deadline for US federal agencies: Oct 29, 2026.
A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
Probability of exploitation in the next 30 days: 99.9% (FIRST EPSS); higher than 99.9% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: PHP Group PHP 8.2.35, 8.3.36, 8.4.27.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Upgrade to PHP Group PHP 8.2.35, 8.3.36, 8.4.27 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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).

Published: Oct 21, 2026
Updated: Nov 5, 2026
EPSS: 99.9% · 99th percentile
CWE: CWE-416

Report tools

JSON

Action score

Now

Patch today or shut off access.

CVSS: 36 / 40 · 9.2 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 30 / 30 · 99.9%

CISA SSVC decision

Exploitation: active
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · php: 9.2; NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Oct 26, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Oct 29, 2026.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
php	php	cpe:2.3:a:php:php
siemens	ruggedcom ape1808 firmware	cpe:2.3:o:siemens:ruggedcom_ape1808_firmware
siemens	ruggedcom ape1808	cpe:2.3:h:siemens:ruggedcom_ape1808
paloaltonetworks	pan-os	cpe:2.3:o:paloaltonetworks:pan-os
paloaltonetworks	panorama m-200	cpe:2.3:h:paloaltonetworks:panorama_m-200
paloaltonetworks	panorama m-300	cpe:2.3:h:paloaltonetworks:panorama_m-300
paloaltonetworks	panorama m-500	cpe:2.3:h:paloaltonetworks:panorama_m-500
paloaltonetworks	panorama m-600	cpe:2.3:h:paloaltonetworks:panorama_m-600
paloaltonetworks	panorama m-700	cpe:2.3:h:paloaltonetworks:panorama_m-700
paloaltonetworks	panorama virtual appliance	cpe:2.3:a:paloaltonetworks:panorama_virtual_appliance
paloaltonetworks	wf-500	cpe:2.3:h:paloaltonetworks:wf-500
paloaltonetworks	wf-500-b	cpe:2.3:h:paloaltonetworks:wf-500-b

and 9 more

Using php? Add it to your stack and be the first to know about CVEs like this one. (PHP)

Versions reported by the vendor

Affected version ranges reported by the assigning authority (php). Independent of NVD's CPE analysis and usually ahead of it.

PHP Group PHP
- 8.2.* and later · before 8.2.35affected · semver
- 8.3.* and later · before 8.3.36affected · semver
- 8.4.* and later · before 8.4.27affected · semver
- 8.5.* and later · before 8.5.12affected · semver

Affected versions · NVD (20)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

paloaltonetworks pan-os11.1.0 and later · before 11.1.4
paloaltonetworks pan-osall versions
paloaltonetworks pan-os12.2.0 and later · before 12.2.4
paloaltonetworks pan-os12.1.0 and later · before 12.1.4
paloaltonetworks pan-os11.2.0 and later · before 11.2.4
paloaltonetworks pan-os10.2.0 and later · before 10.2.7
paloaltonetworks pan-os10.2.10
paloaltonetworks pan-os10.2.11
paloaltonetworks pan-os10.2.12
paloaltonetworks pan-os10.2.13
paloaltonetworks pan-os10.2.14
paloaltonetworks pan-os10.2.15
paloaltonetworks pan-os10.2.16
paloaltonetworks pan-os10.2.17
paloaltonetworks pan-os10.2.18
paloaltonetworks pan-os10.2.7
paloaltonetworks pan-os10.2.8
paloaltonetworks pan-os10.2.9
paloaltonetworks pan-os11.1.10
paloaltonetworks pan-os11.1.11

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
AlmaLinux:10	php	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-bcmath	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-cli	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-common	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-dba	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-dbg	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-devel	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-embedded	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-enchant	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-ffi	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-fpm	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-gd	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-gmp	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-intl	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-ldap	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-mbstring	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-mysqlnd	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-odbc	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-opcache	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-pdo	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-pgsql	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-process	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-snmp	before 8.3.36-1.el10_2	8.3.36-1.el10_2
AlmaLinux:10	php-soap	before 8.3.36-1.el10_2	8.3.36-1.el10_2

+96

Same product

php: all records

Other highest-scoring records for the same primary product.

CVE-2024-4577Argument Injection in PHP-CGIKEV
99Now
CVE-2019-11043Underflow in PHP-FPM can lead to RCEKEV
99Now
CVE-2012-1823sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not properly handle…KEV
99Now

Published before and after this one in the same product

← EarlierCVE-2026-91768Sep 25, 2026 · IPv6 ACL bypass in FastCGI listen.allowed_clients due to partial address comparison (memcmp 12 bytes)
26Monitor
← EarlierCVE-2026-92842Sep 25, 2026 · OOB read / info leak in convert.* stream filters when line-break-chars contains NUL
23Monitor
Later →CVE-2026-109619Oct 21, 2026 · RCE via stale global stateKEV
96Now

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
PHP Group PHP	8.2.35	Vendor (CNA)
PHP Group PHP	8.3.36	Vendor (CNA)
PHP Group PHP	8.4.27	Vendor (CNA)
PHP Group PHP	8.5.12	Vendor (CNA)
almalinux:php	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-bcmath	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-cli	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-common	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-dba	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-dbg	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-devel	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-embedded	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-enchant	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-ffi	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-fpm	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
almalinux:php-gd	8.3.36-1.el10_2 · AlmaLinux:10	Package registry (OSV)
alpine:php82	8.2.35-r0 · Alpine:v3.21	Package registry (OSV)
alpine:php83	8.3.36-r0 · Alpine:v3.22	Package registry (OSV)
alpine:php84	8.4.27-r0 · Alpine:v3.22	Package registry (OSV)
alpine:php85	8.5.12-r0 · Alpine:v3.23	Package registry (OSV)
debian:php8.2	8.2.35-1~deb12u1 · Debian:12	Package registry (OSV)
debian:php8.4	8.4.27-1~deb13u1 · Debian:13	Package registry (OSV)
opensuse:apache2-mod_php8	8.4.27-160000.1.1 · openSUSE:Leap 16.0	Package registry (OSV)
opensuse:matomo	5.14.2-1.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:php8	8.5.12-1.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:php8-embed	8.4.27-160000.1.1 · openSUSE:Leap 16.0	Package registry (OSV)
opensuse:php8-fastcgi	8.4.27-160000.1.1 · openSUSE:Leap 16.0	Package registry (OSV)
opensuse:php8-fpm	8.4.27-160000.1.1 · openSUSE:Leap 16.0	Package registry (OSV)
opensuse:php8-test	8.4.27-160000.1.1 · openSUSE:Leap 16.0	Package registry (OSV)
rocky linux:libzip	0:1.6.1-1.module+el8.10.0+1912+72767185 · Rocky Linux:8	Package registry (OSV)

+28

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Exploit-DB entry ×1
Nuclei detection template ×1
Proof-of-concept repository on GitHub ×50

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	50 repositories	2026-10-18 → 2026-10-21
Exploit-DB entry	remote	2026-10-22
Nuclei detection template	Nuclei template CVE-2026-109618	—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

First PoCOct 18, 2026-4 d
PublishedOct 21, 2026
Fix recordedOct 21, 2026same day
CISA KEVOct 26, 2026+4 d
TodayNov 13, 2026+23 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

RyanCalif.ioreporter
Wizreporter
OpenAIfinder
Arnaud Le Blancremediation developer
Ilija Toviloremediation developer
Jakub Zelenkaremediation developer
Nora Dosscheremediation developer

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-1096190 days apartRCE via stale global stateKEV
96Now
CVE-2026-6722164 days apartUse-After-Free in SOAP using Apache map
38Monitor
CVE-2026-7261164 days apartSoapServer session-persisted object use-after-free via SOAP header fault
25Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-1372 · Oct 21, 2026(PHP Programlama Dili Güvenlik Bildirimi)

All national notices →

Noroxi's write-up

Our blog post on this record: impact, how to check your site and the upgrade steps.

CVE-2026-109618: PHP unauthenticated remote code execution. Is your site affected?

Not on record for this CVE: patch commit or PR link · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

SSVC exploitationnone → activeOct 27, 2026, 2:07 PM UTC
Exploit maturitypoc → weaponizedOct 27, 2026, 2:07 AM UTC
KEV✗ → ✓Oct 27, 2026, 2:07 AM UTC
SSVC exploitation— → noneOct 21, 2026, 4:07 PM UTC
Exploit maturity— → pocOct 21, 2026, 3:09 PM UTC
Fix✗ → ✓Oct 21, 2026, 3:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/php/php-src/security/advisories/GHSA-w8hw-w9fx-j79w

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

What does it mean in your environment?

We use this product, ask for help

Data sources and verification

CNA: php

CVE.org (CNA)Nov 5, 2026, 6:17 PM UTC
CISA ADPNov 5, 2026, 6:17 PM UTC
NVDNov 5, 2026, 7:17 PM UTC
CISA KEVOct 27, 2026, 2:07 AM UTC
FIRST EPSSNov 4, 2026, 12:00 AM UTC
OSV / GHSANov 13, 2026, 3:18 AM UTC
Exploit-DBNov 13, 2026, 3:17 AM UTC
NucleiNov 13, 2026, 3:18 AM UTC
PoC-in-GitHubNov 13, 2026, 3:18 AM UTC

Each line is when that source was last processed for this record.

CVE-2026-109618: RCE via OOM corruption

Noroxi assessment

Get told when this record changes

Follow CVE-2026-109618

What does it mean in your environment?

Affected systems

Is your version affected?

Watch new CVEs for php

Versions reported by the vendor

Package-level exposure

Same product

Remediation

Which version to upgrade to

Exploit status

Research context

Timeline

Credits

Variant candidates

National notice (Türkiye Cybersecurity Directorate / USOM)

Noroxi's write-up

Technical details

Attack conditions

If successful

Root cause

The bug in code

Attack context

Change log

References