# CVE-2026-121261: phpMyAdmin ShapeFile SHP File loadFromFile infinite loop

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- phpMyAdmin / ShapeFile: 4.0.0 (affected); 4.0.1 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 4.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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; source: NVD: cna@vuldb.com

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L; source: NVD: cna@vuldb.com

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:N/I:N/A:P; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-835, CWE-404

## Exploit evidence

- exploit: https://gist.github.com/Ishanoshada/efbda3b5bee92058cc6b08f67d4e7363 (CNA: VulDB)

## References

- https://vuldb.com/vuln/430227 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/430227/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-121261 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1018488 (CNA: VulDB; third-party-advisory)

- https://gist.github.com/Ishanoshada/efbda3b5bee92058cc6b08f67d4e7363 (CNA: VulDB; exploit)

- https://gist.github.com/Ishanoshada/efbda3b5bee92058cc6b08f67d4e7363 (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-121261 (cna@vuldb.com)

- https://vuldb.com/submit/1018488 (cna@vuldb.com)

- https://vuldb.com/vuln/430227 (cna@vuldb.com)

- https://vuldb.com/vuln/430227/cti (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-121261; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-121261; retrieved 2026-11-03; source updated 2026-11-03

Revision: 624bdbd99812a8a696a1653523f8efaa8bcb1b95b14ea34995d03a0c86e7eb58

Canonical: https://y2.dev/cve/CVE-2026-121261

## Agent and API access

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- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

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- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

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- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.