What is CVE-2017-1000430?

CVE-2017-1000430 is a critical-severity vulnerability in Rust-Base64 Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-01-02.

How severe is CVE-2017-1000430?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2017-1000430 known to be exploited?

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

Buffer overflow in Rust-Base64 Project

CVE-2017-1000430

rust-base64 version <= 0.5.1 is vulnerable to a buffer overflow when calculating the size of a buffer to use when encoding base64 using the 'encode_config_buf' and 'encode_config' functions

Vulnerability class: Buffer Overflow

Published 2018-01-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (74.0th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Rust-Base64 Project

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

github.com/RustSec/advisory-db/blob/master/crates/base64/RUSTSEC-2017-0004.toml (Third Party Advisory)

Frequently asked questions

What is CVE-2017-1000430?: CVE-2017-1000430 is a critical-severity vulnerability in Rust-Base64 Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-01-02.
How severe is CVE-2017-1000430?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2017-1000430 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.