# CVE-2025-1218 — PHP

> As of 2026-09-25, CVE-2025-1218 is a LOW-severity vulnerability in PHP, CVSS v3.1 3.4. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2025-1218, most recently “Multiple PHP Vulnerabilities Enable Denial of Service, TLS Verification Bypass, and Credential Leakage (CVE-2026-91765, CVE-2026-91768, CVE-2026-6103 and 8 Others) — GovCERT.HK A26-09-40”.

**Last updated:** 2026-09-25

## What is CVE-2025-1218?

The mysqlnd wire protocol parser reads fields out of server packets before checking that the packet still holds enough bytes for them. A malicious or compromised MySQL server can send a truncated packet and make the client read past the end of the packet buffer, which is undefined behaviour and can crash the process.

The record classifies CVE-2025-1218 under weakness class [CWE-122](https://cwe.mitre.org/data/definitions/122.html). Its CVSS v3 base vector states that the flaw is reachable from an adjacent network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 1 day ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 3.4 — LOW (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 1.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-25

## Is CVE-2025-1218 being exploited?

No public exploitation evidence for CVE-2025-1218 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-09-25. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **PHP Group**: PHP

## How to fix CVE-2025-1218

No vendor patch reference has been recorded for CVE-2025-1218 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2025-1218

1 tracked threat in the Threadlinqs corpus references CVE-2025-1218, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Multiple PHP Vulnerabilities Enable Denial of Service, TLS Verification Bypass, and Credential Leakage (CVE-2026-91765, CVE-2026-91768, CVE-2026-6103 and 8 Others) — GovCERT.HK A26-09-40](https://intel.threadlinqs.com/threat/TL-2026-2658) — MEDIUM · 2026-09-25

## Sources

Enriched from CVE.org, NVD. Last verified by Threadlinqs on 2026-09-26. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — vendor advisory](https://github.com/php/php-src/security/advisories/GHSA-r6x9-5r99-36j7)

Canonical: https://intel.threadlinqs.com/cve/CVE-2025-1218
Full detection coverage and IOCs for threats exploiting CVE-2025-1218 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp