CVE-2026-28525: sbabic swupdate

SWUpdate Integer Underflow in Multipart Upload Parser

CVSS 8.2 HighEPSS 0.0032 · 24th percentile

Published by the CVE Program (CNA: VulnCheck) at 23 Apr 2026, 20:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
sbabic	swupdate pkg:github/sbabic/swupdate	affected 2025.12 and earlier custom unaffected beee2dc0feef1cfe84f1aa6fc980e104b2e47a74 git Other versions: unaffected

Identifiers

CVE-2026-28525

CNA

VulnCheck

Weakness (CWE)

CWE-125 · CWE-191

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.2	High	4.0	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
6.8	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0032, the 24th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 23 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/sbabic/swupdate/commit/beee2dc0feef1cfe84f1aa6fc980e104b2e47a74 patch
www.vulncheck.com/advisories/swupdate-integer-underflow-in-multipart-upload-parser third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.