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Vulnerability record · CVE-2026-33809 · published 25 March 2026

CVE-2026-33809: Golang tiff unrestricted file upload vulnerability

Golang · Tiff

A maliciously crafted TIFF file can cause image decoding to attempt to allocate up 4GiB of memory, causing either excessive resource consumption or an out-of-memory error.

5.3 CVSS 3.1 Medium EPSS 0.39% · top 69.7% CWE-434 · Unrestricted file upload
5.3CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

A maliciously crafted TIFF file can cause image decoding to attempt to allocate up 4GiB of memory, causing either excessive resource consumption or an out-of-memory error.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://go.dev/cl/757660 Mailing List
https://go.dev/issue/78267 Issue Tracking
https://pkg.go.dev/vuln/GO-2026-4815 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-33809), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.