191 lines
7.7 KiB
JSON
191 lines
7.7 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-66731",
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"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"state": "PUBLISHED",
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"assignerShortName": "VulnCheck",
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"dateReserved": "2026-07-27T16:27:47.646Z",
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"datePublished": "2026-07-27T16:57:01.077Z",
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"dateUpdated": "2026-07-31T18:20:09.600Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"shortName": "VulnCheck",
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"dateUpdated": "2026-07-31T18:20:09.600Z"
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},
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"title": "facil.io 0.7.5 - 0.7.6 HTTP/1.1 Chunked Transfer Encoding Parser Crash DoS",
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"descriptions": [
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{
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"lang": "en",
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"value": "facil.io 0.7.5 through 0.7.6 contains a denial-of-service vulnerability in the HTTP/1.1 chunked transfer encoding parser that allows unauthenticated remote attackers to crash the server by sending a negative chunk size value. Attackers can send a single POST request with a Transfer-Encoding: chunked header containing a leading minus sign in the chunk size field, causing the parser in http1_parser.h to compute a large positive integer from the negated value, corrupting internal state and moving the read pointer into unmapped memory resulting in a fault."
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}
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],
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"tags": [
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"x_open-source"
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],
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"datePublic": "2026-07-24T00:00:00.000Z",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-125",
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"description": "Out-of-bounds Read",
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"type": "CWE"
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}
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]
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}
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],
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"affected": [
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{
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"defaultStatus": "affected",
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"vendor": "boazsegev",
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"product": "facil.io",
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"packageURL": "pkg:github/boazsegev/facil.io",
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"repo": "https://github.com/boazsegev/facil.io",
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"versions": [
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{
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"status": "affected",
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"version": "0.7.5",
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"versionType": "semver",
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"lessThanOrEqual": "0.7.6"
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}
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]
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "HIGH",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "HIGH",
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"baseScore": 8.7,
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"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"
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}
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},
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV3_1": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"availabilityImpact": "HIGH",
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"version": "3.1",
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"baseSeverity": "HIGH",
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"baseScore": 7.5,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
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}
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}
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],
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"references": [
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{
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"url": "https://tpaidakis.com/writeups/facilio-parser-dos/",
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"name": "Researcher Blog",
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"tags": [
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"technical-description",
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"exploit"
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]
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},
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{
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"url": "https://github.com/theopaid/Negative-Chunk-Size-Parsing-Causes-Memory-Corruption-in-facil.io-leading-to-Server-Crash",
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"tags": [
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"technical-description",
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"exploit"
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],
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"name": "Researcher Disclosure"
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},
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{
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"url": "https://www.vulncheck.com/advisories/facil-io-http-chunked-transfer-encoding-parser-crash-dos",
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"tags": [
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"third-party-advisory"
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Theodosis Paidakis",
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"type": "finder"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"x_generator": {
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"engine": "vulncheck"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-27T17:30:15.336024Z",
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"id": "CVE-2026-66731",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-07-27T17:30:25.874Z"
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}
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}
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]
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}
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} |