CVE-2026-121261 Details
Description
A vulnerability has been found in phpMyAdmin ShapeFile up to 4.0.1. Impacted is the function ShapeRecord::loadFromFile of the component SHP File Handler. Such manipulation leads to infinite loop. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
A denial-of-service vulnerability has been identified in phpMyAdmin ShapeFile versions through 4.0.1. The issue arises in the SHP File Handler component, specifically within the ShapeRecord::loadFromFile function. When the function processes a truncated .shp record that claims a larger content length than the actual bytes available, it enters an infinite loop. This loop can be exploited remotely, causing CPU exhaustion by pinning a core at 100% indefinitely.
Users can update to phpMyAdmin ShapeFile versions after 4.0.1, where this vulnerability has been patched. The patch involves adding a check to prevent the loop from running indefinitely when invalid shape data is encountered.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 3, 2026CISA-ADP
Assessed Nov 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/Ishanoshada/efbda3b5bee92058cc6b08f67d4e7363 | [email protected] | ExploitTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-121261 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1018488 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/430227 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/430227/cti | [email protected] | AdvisoryContent Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-404 | Improper Resource Shutdown or Release | [email protected] |
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| phpMyAdmin ShapeFile | <= 4.0.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 7, 2026 | CVE Modified | CISA-ADP |
| Nov 3, 2026 | New CVE Received | [email protected] |