{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-3945", "assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "state": "PUBLISHED", "assignerShortName": "TuranSec", "dateReserved": "2026-03-11T08:30:57.837Z", "datePublished": "2026-03-30T07:05:23.295Z", "dateUpdated": "2026-08-10T11:43:50.158Z" }, "containers": { "cna": { "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-190", "description": "CWE-190 Integer Overflow or Wraparound", "type": "CWE" } ] } ], "impacts": [ { "descriptions": [ { "lang": "en", "value": "An unauthenticated remote attacker can send crafted HTTP requests with chunked transfer encoding to keep worker connections occupied, exhausting the MaxClients limit and causing denial of service for legitimate users." } ] } ], "affected": [ { "vendor": "tinyproxy", "product": "tinyproxy", "versions": [ { "status": "affected", "version": "<=1.11.3" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "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).", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "
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).
" } ] } ], "references": [ { "url": "https://github.com/tinyproxy/tinyproxy/issues/602", "tags": [ "issue-tracking", "technical-description" ] }, { "url": "https://github.com/tinyproxy/tinyproxy/pull/603", "tags": [ "patch" ] }, { "url": "https://github.com/tinyproxy/tinyproxy/commit/969852c", "tags": [ "patch" ] }, { "url": "https://github.com/tinyproxy/tinyproxy/commit/bb7edc4", "tags": [ "patch" ] }, { "url": "https://github.com/tinyproxy/tinyproxy/releases", "tags": [ "release-notes" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV2_0": { "version": "2.0", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "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" } } ], "source": { "discovery": "EXTERNAL" }, "credits": [ { "lang": "en", "value": "Muxammadiyev G'iyosiddin", "type": "finder" } ], "title": "tinyproxy Integer Overflow in HTTP Chunked Transfer-Encoding Parser Leading to Denial of Service", "providerMetadata": { "orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "shortName": "TuranSec", "dateUpdated": "2026-08-10T11:43:50.158Z" }, "datePublic": "2026-03-30T07:05:23.295Z" }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-03-30T15:01:46.663274Z", "id": "CVE-2026-3945", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-30T15:02:33.584Z" } } ] } }