Is CVE-2026-28497 actively exploited?

No active exploitation of CVE-2026-28497 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-28497 be exploited remotely?

Yes. CVE-2026-28497 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-28497?

CVE-2026-28497 has a CVSS score of 9.3 (CRITICAL).

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CRITICAL

CVE-2026-28497

CWE-190Published: March 6, 2026· Updated: Mar 9, 2026

9.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.4th

Official Description

TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Prior to version 2.03, an integer overflow vulnerability in the string-to-integer conversion routine (_Val) allows an unauthenticated remote attacker to bypass Content-Length restrictions and perform HTTP Request Smuggling. This can lead to unauthorized access, security filter bypass, and potential cache poisoning. The impact is critical for servers using persistent connections (Keep-Alive). This issue has been patched in version 2.03.

NVD Source

Technical Analysis

CVE-2026-28497 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/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