What is CVE-2022-40083?

CVE-2022-40083 is a critical-severity vulnerability in Labstack Echo, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 9.6/10. Published 2022-09-28.

How severe is CVE-2022-40083?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Is CVE-2022-40083 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Open Redirect in Labstack Echo

CVE-2022-40083

Labstack Echo v4.8.0 was discovered to contain an open redirect vulnerability via the Static Handler component. This vulnerability can be leveraged by attackers to cause a Server-Side Request Forgery (SSRF).

Vulnerability class: Open Redirect

Published 2022-09-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.032 (87.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.032 · change: +0.008

Affected products

Labstack Echo — versions 4.8.0

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

Public proof-of-concept exploits

References

github.com/labstack/echo/issues/2259 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2022-40083?: CVE-2022-40083 is a critical-severity vulnerability in Labstack Echo, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 9.6/10. Published 2022-09-28.
How severe is CVE-2022-40083?: Critical severity. CVSS v3 base score is 9.6 out of 10.
Is CVE-2022-40083 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.