How severe is CVE-2026-42158?

CVE-2026-42158 has a CVSS 4.0 base score of 2.3, rated low severity.

Is CVE-2026-42158 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42158?

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

Does CVE-2026-42158 have an EU (EUVD) identifier?

Yes. CVE-2026-42158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29875.

When was CVE-2026-42158 published?

CVE-2026-42158 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-42158

CVE-2026-42158 is a low-severity vulnerability with a CVSS 4.0 base score of 2.3. 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-284.

Key facts

Severity: Low (CVSS 4.0 base score 2.3)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29875
Weakness: CWE-284
Published: 2026-05-12
Last modified: 2026-06-17

Description

Flowsint is an open-source OSINT graph exploration tool designed for cybersecurity investigation, transparency, and verification. Prior to 1.2.3, an adversary with knowledge of an investigation ID, could update the metadata of an investigation of another user. This vulnerability is fixed in 1.2.3.

Frequently asked questions

What is CVE-2026-42158?: Flowsint is an open-source OSINT graph exploration tool designed for cybersecurity investigation, transparency, and verification. Prior to 1.2.3, an adversary with knowledge of an investigation ID, could update the metadata of an investigation of another user. This vulnerability is fixed in 1.2.3.
How severe is CVE-2026-42158?: CVE-2026-42158 has a CVSS 4.0 base score of 2.3, rated low severity.
Is CVE-2026-42158 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42158?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42158 have an EU (EUVD) identifier?: Yes. CVE-2026-42158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29875.
When was CVE-2026-42158 published?: CVE-2026-42158 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://github.com/reconurge/flowsint/security/advisories/GHSA-5h6v-5hv3-3jjw

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