Cyber Resilience

CVE-2026-67198

Public PoC
Published
04 August 2026
Modified
04 August 2026
CVSS Score v4 8.7
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
EPSS Score 0.0020 10th percentile
Risk Priority 43 floored blend · peak EPSS

Summary

CVE-2026-67198 is a high-severity PHP (CWE-616) vulnerability in Christbowel (inferred from references). Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 10th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SA-8 (Security and Privacy Engineering Principles) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

Perspective 5.0.0 contains a denial-of-service vulnerability in the VirtualServer protocol dispatcher that allows unauthenticated remote attackers to crash the server process by sending malformed or incomplete protobuf messages. Attackers can send well-formed requests such as ViewToArrowReq with no viewport set…

more

or MakeTableReq with no data field to trigger unwrap() calls on None values at nine distinct sites, causing the process to abort with SIGABRT.

CWE(s)
CWE-616

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-52130Shared CWE-616
CVE-2024-29858Shared CWE-616
CVE-2024-31601Shared CWE-616
CVE-2025-67084Shared CWE-616
CVE-2025-59402Shared CWE-616
CVE-2024-52305Shared CWE-616
CVE-2023-38947Shared CWE-616
CVE-2024-28520Shared CWE-616
CVE-2026-22789Shared CWE-616

Affected Assets

Christbowel
—
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles such as complete mediation and least privilege require the use of the canonical $_FILES array rather than attacker-writable globals.

SI-10 Information Input Validation partial match

Proper validation of all file-upload inputs stops attackers from supplying or overwriting the legacy global variables that the flawed code relies on.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent use of the deprecated PHP upload globals and variable-overwrite flaws.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect the legacy upload pattern before deployment.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates proper input handling and file-upload validation, directly addressing the outdated global-variable approach.

A.8.26 Application security requirements partial match
prevents

Application security requirements include secure file-upload mechanisms that eliminate reliance on the four legacy PHP variables.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles discourage unsafe global state, indirectly reducing exposure to variable-injection attacks.

A.8.28 Secure coding partial match
prevents

Secure coding explicitly prohibits use of deprecated upload variables and requires validated, server-side file handling.

References