What is CVE-2022-26300?

CVE-2022-26300 is a high-severity vulnerability in Eosio Project Eos, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2022-03-17.

How severe is CVE-2022-26300?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Eosio Project Eos

CVE-2022-26300

EOS v2.1.0 was discovered to contain a heap-buffer-overflow via the function txn_test_gen_plugin.

Vulnerability class: Buffer Overflow

Published 2022-03-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% 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

Eosio Project Eos — versions 2.1.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/EOSIO/eos/issues/10820 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-26300?: CVE-2022-26300 is a high-severity vulnerability in Eosio Project Eos, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2022-03-17.
How severe is CVE-2022-26300?: High severity. CVSS v3 base score is 7.5 out of 10.