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CVE-2026-42504

Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ff779e239ad73269e6976dfb5d4f4737faca5520fee8f9e8dbdfb2b02de9a26a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-407","description":"CWE-407 Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://pkg.go.dev","defaultStatus":"unaffected","packageName":"mime","product":"mime","programRoutines":[{"name":"WordDecoder.DecodeHeader"}],"vendor":"Go standard library","versions":[{"lessThan":"1.25.11","status":"affected","version":"0","versionType":"semver"},{"lessThan":"1.26.4","status":"affected","version":"1.26.0-0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-407","description":"CWE-407 Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"https://go.dev/cl/774481"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/cna/references/1
{"url":"https://go.dev/issue/79217"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/cna/references/0
{"url":"https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/cna/references/2
{"url":"https://pkg.go.dev/vuln/GO-2026-5038"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c366b682535a2ed7531193a9a1cdaf4e6073798ecac55f372b5caf7d8378f3e · sha256:2b4cfe6014fdd807… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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