CVE-2026-46599Network attack vector

Service interruption via unbounded PackBits expansion

Published May 29, 2026 · Updated May 29, 2026

Resource exhaustion in golang.org/x/image/tiff before 0.41.0 allows remote attackers to interrupt services via crafted TIFF images. The Decode path calls unpackBits without bounding PackBits expansion against encoded size, so compact input drives disproportionate decompression. Exploitation requires a consuming application to pass an attacker-controlled TIFF to Decode and affects availability without reported data access or modification.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in golang.org/x/image/tiff before 0.41.0 allows remote attackers to interrupt services via crafted TIFF images. The Decode path calls unpackBits without bounding PackBits expansion against encoded size, so compact input drives disproportionate decompression. Exploitation requires a consuming application to pass an attacker-controlled TIFF to Decode and affects availability without reported data access or modification.

The record

CVE
CVE-2026-46599
Published
May 29, 2026
Updated
May 29, 2026
Vendor
golang.org/x/image
Product
golang.org/x/image/tiff
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.41.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

golang.org/x/image · golang.org/x/image/tiffversion=0 <0.41.0

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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