CVE-2026-42504
HighDDoS
Published: 02 June 2026
Published
02 June 2026
Modified
04 June 2026
KEV Added
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Patch
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CVSS Score v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.0038
30.1th percentile
Risk Priority
15
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2026-42504 is a high-severity Inefficient Algorithmic Complexity (CWE-407) vulnerability in Go (inferred from references). Its CVSS base score is 7.5 (High).
Operationally, ranked at the 30.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-34039
Vulnerability details
Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
- CWE(s)
Related Threats
CVEs Like This One
CVE-2025-67841Shared CWE-407
CVE-2026-31934Shared CWE-407
CVE-2026-1285Shared CWE-407
CVE-2026-31932Shared CWE-407
CVE-2026-27903Shared CWE-407
CVE-2026-31937Shared CWE-407
CVE-2026-3988Shared CWE-407
CVE-2025-14550Shared CWE-407
CVE-2026-34573Shared CWE-407
CVE-2026-31933Shared CWE-407
Affected Assets
Go
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inferred from references and description; NVD did not file a CPE for this CVE
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
addresses: CWE-407
Addresses inefficient algorithms whose complexity can be exploited for DoS.