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CVE-2026-3945

An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol() without properly validating overflow conditions (e.g., errno == ERANGE). A crafted chunk size such as 0x7fffffffffffffff (LONG_MAX) bypasses the existing validation check (chunklen < 0), leading to a signed integer overflow du
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:79e6f6428afa84cf5f92af026a3fabd9a8e77bbb317dbe644d9ed43cd16d5b2a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 3 assertions

{"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:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"COMPLETE","baseScore":7.8,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/metrics/0/cvssV2_0

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/metrics/2/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"tinyproxy","vendor":"tinyproxy","versions":[{"status":"affected","version":"<=1.11.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/affected/0

Provider-owned CVSS observations

3 source assertions
{"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:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"COMPLETE","baseScore":7.8,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/metrics/0/cvssV2_0
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/metrics/2/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["patch"],"url":"https://github.com/tinyproxy/tinyproxy/commit/969852c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/references/2
{"tags":["patch"],"url":"https://github.com/tinyproxy/tinyproxy/commit/bb7edc4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/references/3
{"tags":["issue-tracking","technical-description"],"url":"https://github.com/tinyproxy/tinyproxy/issues/602"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/references/0
{"tags":["patch"],"url":"https://github.com/tinyproxy/tinyproxy/pull/603"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/references/1
{"tags":["release-notes"],"url":"https://github.com/tinyproxy/tinyproxy/releases"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8380a130294781b85e99f2e74c52b20b425f32d771f5e2713a140d312d9c8d7 · sha256:e442c7d72dd05d5d… · /containers/cna/references/4

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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