CVE-2026-35608Public exploitNetwork attack vector

Stored XSS via unsanitized SVG previews

Published Apr 7, 2026 · Updated Apr 7, 2026

Stored XSS in the file preview endpoint in QuickDrop before 1.5.3 allows remote attackers to execute JavaScript via uploaded SVG files. The upload flow validates the SVG file type but does not sanitize embedded script content, and the preview serves the file with a browser-renderable content type. Exploitation requires a user to preview the uploaded file, where the script runs in the application's origin and can read or alter data accessible to that user's browser session.

CVSS severity5.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the file preview endpoint in QuickDrop before 1.5.3 allows remote attackers to execute JavaScript via uploaded SVG files. The upload flow validates the SVG file type but does not sanitize embedded script content, and the preview serves the file with a browser-renderable content type. Exploitation requires a user to preview the uploaded file, where the script runs in the application's origin and can read or alter data accessible to that user's browser session.

The record

CVE
CVE-2026-35608
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
RoastSlav
Product
QuickDrop
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RoastSlav · QuickDropversion=< 1.5.3

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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