What is CVE-2022-26181?

CVE-2022-26181 is a high-severity vulnerability in Dropbox Lepton, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-02-28.

How severe is CVE-2022-26181?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Dropbox Lepton

CVE-2022-26181

Dropbox Lepton v1.2.1-185-g2a08b77 was discovered to contain a heap-buffer-overflow in the function aligned_dealloc():src/lepton/bitops.cc:108.

Vulnerability class: Buffer Overflow

Published 2022-02-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Dropbox Lepton — versions 1.2.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/dropbox/lepton/issues/154 (Third Party Advisory, Issue Tracking)
github.com/dropbox/lepton (Product)
drive.google.com/file/d/1bJlHozO37c5NZ1wI0NBWh0yHHyTcfaQL/view (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-26181?: CVE-2022-26181 is a high-severity vulnerability in Dropbox Lepton, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-02-28.
How severe is CVE-2022-26181?: High severity. CVSS v3 base score is 7.8 out of 10.