CVE-2026-109618
CRITICALDescription
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).
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CVSS v3.1 Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — Exploit Prediction
0.1184
Probability of exploitation
0.96%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
Weakness Type (CWE)
CWE-416
Use After Free
CWE-755
CWE-755
CWE-824
CWE-824
CWE-1325
CWE-1325
Affected Products
| Vendor | Product |
|---|---|
| php | php |
| php | php |
| php | php |
| php | php |
| siemens | ruggedcom_ape1808_firmware |
| siemens | ruggedcom_ape1808 |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
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| paloaltonetworks | pan-os |
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| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | pan-os |
| paloaltonetworks | panorama_m-200 |
| paloaltonetworks | panorama_m-300 |
| paloaltonetworks | panorama_m-500 |
| paloaltonetworks | panorama_m-600 |
| paloaltonetworks | panorama_m-700 |
| paloaltonetworks | panorama_virtual_appliance |
| paloaltonetworks | pan-os |
| paloaltonetworks | wf-500 |
| paloaltonetworks | wf-500-b |
References
Advisories & Patches
Frequently Asked Questions
What is CVE-2026-109618? +
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). It has a CVSS v3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2026-109618? +
CVE-2026-109618 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.1184, placing it in the 1th percentile for exploitation probability.
What products are affected by CVE-2026-109618? +
CVE-2026-109618 affects products from paloaltonetworks, php, siemens, specifically: pan-os, panorama_m-200, panorama_m-300, panorama_m-500, panorama_m-600, panorama_m-700, panorama_virtual_appliance, php, ruggedcom_ape1808, ruggedcom_ape1808_firmware, wf-500, wf-500-b. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-109618? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.
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