CVE-2026-46599: golang.org/x/image/tiff has excessive resource consumption in PackBits decompression

July 2, 2026

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.

References

github.com/advisories/GHSA-q675-qj96-32m9
go.dev/cl/759960
go.dev/issue/79577
groups.google.com/g/golang-announce/c/uhYX90BlBvI
nvd.nist.gov/vuln/detail/CVE-2026-46599
pkg.go.dev/vuln/GO-2026-5032

Code Behaviors & Features

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