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.
CVE-2026-42158
LOWNVD 2.32.3—Elevated
EchelonGraph scoreMEDIUM confidence
This low-severity CVE scores 2.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
2.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 2.3Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 2.3
- EG Score
- 2.3(medium)
- EPSS
- 6.6%
- KEV
- Not listed
Published
May 12, 2026
Last Modified
May 14, 2026
References (2)
- security-advisories@githubhttps://github.com/reconurge/flowsint/security/advisories/GHSA-5h6v-5hv3-3jjw
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/reconurge/flowsint/security/advisories/GHSA-5h6v-5hv3-3jjw
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Frequently asked(5)
What is CVE-2026-42158?
CVE-2026-42158 is a low vulnerability published on May 12, 2026. 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.
When was CVE-2026-42158 disclosed?
CVE-2026-42158 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on May 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42158 actively exploited?
CVE-2026-42158 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42158?
CVE-2026-42158 has a CVSS v3 base score of 2.3 (NVD).
How do I remediate CVE-2026-42158?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42158, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-42158
Is Your Infrastructure Affected by CVE-2026-42158?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.