High severity · published May 29, 2026
CVE-2026-46599
Excessive resource consumption in PackBits decompression in golang.org/x/image/tiff
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
The TIFF decoder does not place a limit on the size of PackBits-compressed data. A maliciously-crafted image can exploit this to cause a small image (both in terms of pixel width/height and encoded size) to make the decoder decode large amounts of compressed data.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
golang.org/x/image/tiff · golang.org/x/image
before 0.41.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46599
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46599
go.dev
https://go.dev/cl/759960
go.dev
https://go.dev/issue/79577
groups.google.com
https://groups.google.com/g/golang-announce/c/uhYX90BlBvI
pkg.go.dev
https://pkg.go.dev/vuln/GO-2026-5032
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CVE-2026-33809
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