CVE-2026-62378: RustFS Console: Critical Stored XSS in Preview Modal leading to Administrative Account Takeover
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-11 15:49 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
RustFS Console is a web management console for the RustFS distributed file system. From 0.1.7 until 0.1.10, the RustFS Console components/object/preview-modal.tsx and components/object/pdf-viewer.tsx extension-based PDF preview path can render HTML content uploaded as .pdf, allowing stored cross-site scripting in the management console and exposure of administrator AccessKeyId, SecretAccessKey, and SessionToken values. This is caused by a regression of CVE-2026-27822. This vulnerability is fixed in 0.1.10.
Description quoted from the CVE record (assigned by GitHub_M, published 2026-07-15).
Weakness: CWE-79: Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’)
How it can be exploited
Exploitable over the network with low attack complexity needing low privileges and a user must take an action. Impact: confidentiality high, integrity high, availability high. CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CISA assessment (SSVC): CISA assesses that a public proof of concept exists. Automatable: no. Technical impact: total.
Public exploit evidence (Exploit Observer)
Exploit Observer found 3 code repositories naming this CVE.
Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.
See all 5 references on Exploit Observer
Live scores
- EPSS
- 0.004
low predicted chance of attack - VEDAS
- 0.987
strong exploit evidence - On CISA KEV
- Not listed
- Detection rule
- Suricata
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| rustfs console | version >= 0.1.7, < 0.1.10 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
No fixed version or vendor advisory is listed in the CVE record yet. Watch the vendor’s security page.
How to detect it
Suricata rules (network detection)
1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-62378 RustFS Console - Stored XSS via HTML Content Uploaded as PDF. Add them to your Suricata rule set and reload.
Show the rules
# CVE-2026-62378 - RustFS Console 0.1.7-0.1.9 renders a file uploaded as .pdf as HTML in the
# preview modal (components/object/preview-modal.tsx, pdf-viewer.tsx; regression of
# CVE-2026-27822), yielding stored XSS and exposure of admin AccessKeyId/SecretAccessKey/
# SessionToken (fixed in 0.1.10). Detect an object upload whose key ends in .pdf but whose body
# is HTML/script rather than a real PDF (a genuine PDF body begins with %PDF).
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-62378 RustFS Console - Stored XSS via HTML Content Uploaded as PDF"; flow:established,to_server; http.method; pcre:"/^(?:PUT|POST)$/"; http.uri; content:".pdf"; nocase; fast_pattern; http.request_body; pcre:"/(?:<|%3c)\s*(?:script|svg|iframe|foreignobject|html|!doctype\s+html)|on(?:load|error)\s*(?:=|%3d)/i"; classtype:web-application-attack; reference:cve,CVE-2026-62378; reference:url,https://www.exploit.observer/?keyword=CVE-2026-62378&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=rustfs&match=exact; sid:1101203; rev:1;)
CVE-2026-62378.rules on GitHub
References
Other references
- https://github.com/rustfs/rustfs/security/advisories/GHSA-7gcx-wg4x-q9x6 (x_refsource_CONFIRM)
- https://github.com/rustfs/console/commit/49630dc140e6818aaee8879ade038a129838a2f2 (x_refsource_MISC)
- https://github.com/rustfs/console/releases/tag/v0.1.10 (x_refsource_MISC)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
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