Is CVE-2026-40977 actively exploited?

No active exploitation of CVE-2026-40977 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40977 be exploited remotely?

No. CVE-2026-40977 requires local access to exploit.

What is the CVSS score of CVE-2026-40977?

CVE-2026-40977 has a CVSS score of 6.7 (MEDIUM).

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MEDIUM

CVE-2026-40977

CWE-59Published: April 28, 2026· Updated: Apr 30, 2026

6.7

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.8th

Official Description

When an application is configured to use `ApplicationPidFileWriter`, a local attacker with write access to the PID file's location can corrupt one file on the host each time the application is started.

Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); PID file / symlink behavior (`ApplicationPidFileWriter`). Versions that are no longer supported are also affected per vendor advisory.

NVD Source

Technical Analysis

CVE-2026-40977 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.7.