3.1

CVE-2026-82237: filebrowser through 2.63.23 Stale Share Link via File Rename

Awaiting analysis
AliasesCGA-23wq-48rj-5fjqCGA-fjrp-3r3q-c3gjCGA-gg3c-h9qc-5ghq
Published 28-08-2026Last modified 28-08-2026

Vulnerability summary

CVE-2026-82237 is a low (CVSS 3.1) Incomplete Cleanup vulnerability in filebrowser. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
3.1/10
010
Low · v3.1 (CVE.org)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 28-08-2026
    PublishedVulnerability first disclosed.
  2. 28-08-2026
    Last modifiedVulnerability information updated.

Description

filebrowser through 2.63.23 does not remove share records when a shared file is renamed (only deletion triggers share cleanup). The share record is keyed by path, so it survives the rename and remains dormant (returning 404 while the path is empty). When any new, unrelated file later appears at the original shared path — via re-upload, another user with create permission, or a hook — the stale public share link serves that new file under the original link's password and expiry settings, unexpectedly exposing it.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard2 products
  • filebrowserAll versions (No fix recorded)
  • filebrowser-compatAll versions (No fix recorded)
Wolfi2 products
  • filebrowserAll versions (No fix recorded)
  • filebrowser-compatAll versions (No fix recorded)
Filebrowser1 product

3 vendors · 5 products

References

4 links