What is CVE-2011-3617?

CVE-2011-3617 is a medium-severity vulnerability in Tahoe-Lafs, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2019-11-26.

How severe is CVE-2011-3617?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Tahoe-Lafs

CVE-2011-3617

Tahoe-LAFS v1.3.0 through v1.8.2 could allow unauthorized users to delete immutable files in some cases.

Vulnerability class: Broken Access Control

Published 2019-11-26 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (63.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Tahoe-Lafs — versions v1.3.0 through v1.8.2
Debian Linux — versions 8.0, 9.0, 10.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-tracker.debian.org/tracker/CVE-2011-3617 (Third Party Advisory)
access.redhat.com/security/cve/cve-2011-3617 (Broken Link)
people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-3617.html (Third Party Advisory)

Frequently asked questions

What is CVE-2011-3617?: CVE-2011-3617 is a medium-severity vulnerability in Tahoe-Lafs, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2019-11-26.
How severe is CVE-2011-3617?: Medium severity. CVSS v3 base score is 6.5 out of 10.