How severe is CVE-2026-40977?

CVE-2026-40977 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2026-40977 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40977?

CVE-2026-40977 affects Vmware Spring Boot. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40977?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40977 have an EU (EUVD) identifier?

Yes. CVE-2026-40977 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25941.

When was CVE-2026-40977 published?

CVE-2026-40977 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-40977

CVE-2026-40977 is a medium-severity vulnerability in Vmware Spring Boot with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-59.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25941
Weakness: CWE-59
Affected product: Vmware Spring Boot
Published: 2026-04-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40977?: 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.
How severe is CVE-2026-40977?: CVE-2026-40977 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2026-40977 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40977?: CVE-2026-40977 affects Vmware Spring Boot. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40977?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40977 have an EU (EUVD) identifier?: Yes. CVE-2026-40977 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25941.
When was CVE-2026-40977 published?: CVE-2026-40977 was published on 2026-04-28 and last updated on 2026-06-17.

References

https://spring.io/security/cve-2026-40977

Affected products (1)

cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*

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