7.1

CVE-2026-90927: filebrowser through 2.63.23 Denial of Service via unbounded WebSocket message

Awaiting analysis
AliasesCGA-5q9m-2xqp-939jCGA-frvg-8xj5-qhh3CGA-q66c-4c6r-gv2w
Published 14-09-2026Last modified 16-09-2026

Vulnerability summary

CVE-2026-90927 is a high (CVSS 7.1) Uncontrolled Resource Consumption vulnerability in filebrowser. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v4.0 (CVE.org)
EPSS score
0.44%
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. 14-09-2026
    PublishedVulnerability first disclosed.
  2. 16-09-2026
    Last modifiedVulnerability information updated.

Description

filebrowser through 2.63.23 fails to limit WebSocket message size in the /api/command handler before checking permissions, allowing authenticated users to buffer arbitrarily large messages. Attackers can send oversized WebSocket messages to exhaust server heap memory and cause denial of service regardless of EnableExec setting or Execute permission.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.44% 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