CVE-2025-61728

Excessive CPU consumption when building archive index in archive/zip

MEDIUM
6.5
CVSS Score
Published: January 28, 2026 at 07:30 PM UTC
Updated: June 17, 2026 at 09:50 AM UTC
2 products affected across 2 vendorsGoArchive/zip

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

archive/zip uses a super-linear file name indexing algorithm that is invoked the first time a file in an archive is opened. This can lead to a denial of service when consuming a maliciously constructed ZIP archive.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.24.121.25.0 ≤ v < 1.25.6
v < 1.24.121.25.0 ≤ v < 1.25.61.25.0
Affected range stops below 1.24.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.25.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (5)

Patch
Source: cverecord
https://go.dev/cl/736713
Patch
Source: cverecord
https://go.dev/issue/77102
Vendor Advisory
Source: cverecord
https://pkg.go.dev/vuln/GO-2026-4342
ExploitMailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/01/15/4

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-770

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