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Threatist priority CRITICAL 0 HIGH 0 MEDIUM 2 LOW 0

Signals Exploited in the wild (KEV) 0 Patch available 2 No fix listed 0 Has CVE 2

Fix status Fixed 0 Partial 2 Will not fix 0 Deferred 0 No fix listed 0

Impact type Code execution 0 Privilege escalation 0 Security bypass 0 Information disclosure 0 Tampering 0 Denial of service 1 Spoofing 0 Cross-site scripting 0 SQL injection 0

Attack vector Network 2 Adjacent network 0 Local 0 Physical 0

Requirements No authentication 2 No user interaction 2

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Weakness (CWE) CWE-770 Allocation of Resources Without Limits or Throttling 1

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Release: Go standard library net/mail 1.25.10, 1.26.3 × Clear all filters

TI-2026-28702 CVE-2026-39820 · GHSA-p9h5-jm8x-mjm5

Quadratic string concatentation in consumeComment in net/mail

Priority MEDIUM 40

Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00784 · Published 2026-05-07 · Partial fix · 1.25.10, 1.26.3 CWE-770

TI-2026-30782 CVE-2026-42499 · GHSA-xq5j-9r39-c3vf

Quadratic string concatenation in consumePhrase in net/mail

Priority MEDIUM 40

Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.

CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00798 · Published 2026-05-07 · Partial fix · 1.25.10, 1.26.3

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