What is CVE-2020-36316?

CVE-2020-36316 is a medium-severity vulnerability in Relic Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2021-04-07.

How severe is CVE-2020-36316?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Relic Project

CVE-2020-36316

In RELIC before 2021-04-03, there is a buffer overflow in PKCS#1 v1.5 signature verification because garbage bytes can be present.

Vulnerability class: Buffer Overflow

Published 2021-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (65.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Relic Project

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/relic-toolkit/relic/tree/32eb4c257fc80328061d66639b1cdb35dbed51a2 (Third Party Advisory)
github.com/relic-toolkit/relic/ (Product, Third Party Advisory)
github.com/relic-toolkit/relic/commit/76c9a1fdf19d9e92e566a77376673e522aae9f80 (Patch, Third Party Advisory)
github.com/relic-toolkit/relic/issues/155 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-36316?: CVE-2020-36316 is a medium-severity vulnerability in Relic Project, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2021-04-07.
How severe is CVE-2020-36316?: Medium severity. CVSS v3 base score is 5.5 out of 10.