What is CVE-2026-43929?

CVE-2026-43929 is a high-severity vulnerability in Felippe-regazio Ssrfcheck, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.2/10. Published 2026-05-12.

How severe is CVE-2026-43929?

High severity. CVSS v3 base score is 8.2 out of 10.

SSRF in Felippe-regazio Ssrfcheck

CVE-2026-43929

ssrfcheck is a library that checks if a string contains a potential SSRF attack. In 1.3.0 and earlier, ssrfcheck fails to block Server-Side Request Forgery attacks when the target private IP address is encoded as an IPv4-mapped IPv6 addres…

EPSS: 0.001 (16.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

Felippe-regazio Ssrfcheck — versions <= 1.3.0

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs
CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-43929?: CVE-2026-43929 is a high-severity vulnerability in Felippe-regazio Ssrfcheck, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.2/10. Published 2026-05-12.
How severe is CVE-2026-43929?: High severity. CVSS v3 base score is 8.2 out of 10.