What is CVE-2017-10862?

CVE-2017-10862 is a medium-severity vulnerability in Really Jwt-Scala, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2017-10-12.

How severe is CVE-2017-10862?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Really Jwt-Scala

CVE-2017-10862

jwt-scala 1.2.2 and earlier fails to verify token signatures correctly which may lead to an attacker being able to pass specially crafted JWT data as a correctly signed token.

Published 2017-10-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Really Jwt-Scala
Reallyl Io Jwt-Scala — versions 1.2.2 and earlier

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

github.com/reallylabs/jwt-scala (Third Party Advisory)
jvn.jp/en/vu/JVNVU90916766/index.html (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2017-10862?: CVE-2017-10862 is a medium-severity vulnerability in Really Jwt-Scala, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2017-10-12.
How severe is CVE-2017-10862?: Medium severity. CVSS v3 base score is 5.3 out of 10.