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CVE-2026-42304

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attack via resource exhaustion during DNS name decompression. A remote, unauthenticated attacker can exploit this by sending a crafted TCP DNS packet containing deeply chained compression pointers. This flaw bypasses previous loop-prevention logic, causing the single-threaded Twisted reactor to hang while processing million
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:47311667b49b683eccdee2ddf4d274bb3b325948548274298fe11f37d98620f9
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

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"twisted","vendor":"twisted","versions":[{"status":"affected","version":"< 26.4.0rc2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /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:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-407","description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73e38cfac50599f385bafe43e0f06fe2a3e3ab6362050946b0df64a43048e752 · sha256:071e2932e1a69ec5… · /containers/adp/0/references/0

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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