CVE-2026-45797

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Source

https://cve.org/CVERecord?id=CVE-2026-45797

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45797.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-45797

Aliases

GHSA-m94h-jxvc-hhch

Published

2026-07-20T15:43:13.473Z

Modified

2026-07-21T03:47:03.807329451Z

Severity

6.4 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator

Summary

HeyForm Vulnerable to Stored XSS via Unauthenticated SVG File Upload

Details

HeyForm is an open-source form builder. Prior to version 3.0.0-rc.7, the /api/upload endpoint allows unauthenticated file uploads including SVG files. Uploaded SVGs are stored in the static assets directory and served with Content-Type: image/svg+xml by Express's serve-static middleware, allowing an attacker to achieve stored cross-site scripting (XSS) on the heyform domain without any authentication. Version 3.0.0-rc.7 contains a patch for the issue.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45797.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-434",
        "CWE-79"
    ]
}

References

Affected packages

Git / github.com/heyform/heyform

Affected ranges

Type

GIT

Repo

https://github.com/heyform/heyform

Events

Introduced

Fixed

c8660e4fe4b910e8de2c6ca6e9840a9a67597d5a

Database specific

{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.0.0-rc.7"
        }
    ]
}

Affected versions

v0.*

v0.0.1

v0.0.10

v0.0.11

v0.0.12

v0.0.13

v0.0.15

v0.0.16

v0.0.17

v0.0.2

v0.0.3

v0.0.4

v0.0.5

v0.0.6

v0.0.7

v0.0.8

v0.0.9

v0.1.0

v3.*

v3.0.0-alpha-2

v3.0.0-alpha.3

v3.0.0-rc.1

v3.0.0-rc.2

v3.0.0-rc.3

v3.0.0-rc.4

v3.0.0-rc.5

v3.0.0-rc.6

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45797.json"