CVE-2026-58226

{"id": "CVE-2026-58226", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-58226", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-06T12:49:38.954923Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "affectedData": [{"cpes": ["cpe:2.3:a:elixir-mint:hpax:*:*:*:*:*:*:*:*"], "repo": "https://github.com/elixir-mint/hpax", "vendor": "elixir-mint", "modules": ["Elixir.HPAX", "Elixir.HPAX.Types"], "product": "hpax", "versions": [{"status": "affected", "version": "0.1.1", "lessThan": "1.0.4", "versionType": "semver"}], "packageURL": "pkg:hex/hpax", "packageName": "hpax", "programFiles": ["lib/hpax.ex", "lib/hpax/types.ex"], "collectionURL": "https://repo.hex.pm", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.HPAX':decode/2"}, {"name": "'Elixir.HPAX.Types':decode_integer/2"}, {"name": "'Elixir.HPAX.Types':decode_remaining_integer/3"}]}, {"cpes": ["cpe:2.3:a:elixir-mint:hpax:*:*:*:*:*:*:*:*"], "repo": "https://github.com/elixir-mint/hpax", "vendor": "elixir-mint", "modules": ["Elixir.HPAX", "Elixir.HPAX.Types"], "product": "hpax", "versions": [{"status": "affected", "version": "56db437a7e2c515e3bdd770ac7947b02cd2390d0", "lessThan": "1ba4bb2dc91e80089cf89c73970ac3ded76f17eb", "versionType": "git"}], "packageURL": "pkg:github/elixir-mint/hpax", "packageName": "elixir-mint/hpax", "programFiles": ["lib/hpax.ex", "lib/hpax/types.ex"], "collectionURL": "https://github.com", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.HPAX':decode/2"}, {"name": "'Elixir.HPAX.Types':decode_integer/2"}, {"name": "'Elixir.HPAX.Types':decode_remaining_integer/3"}]}]}], "published": "2026-07-06T11:16:31.143", "references": [{"url": "https://cna.erlef.org/cves/CVE-2026-58226.html", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/elixir-mint/hpax/commit/1ba4bb2dc91e80089cf89c73970ac3ded76f17eb", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/elixir-mint/hpax/security/advisories/GHSA-jj2p-32j7-whj2", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-58226", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/elixir-mint/hpax/security/advisories/GHSA-jj2p-32j7-whj2", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "description": [{"lang": "en", "value": "CWE-407"}]}], "descriptions": [{"lang": "en", "value": "Inefficient Algorithmic Complexity vulnerability in elixir-mint hpax allows unauthenticated denial-of-service via unbounded HPACK integer decoding.\n\nhpax decodes HPACK variable-length integers with no upper bound on the decoded value or the number of continuation octets. 'Elixir.HPAX.Types':decode_remaining_integer/3 accumulates the integer as int + (value <<< m), shifting by 7 more bits for each continuation octet and stopping only on a terminating octet or truncated input, never because the integer grew too large. Because BEAM integers are arbitrary precision, a run of N continuation octets builds an O(N)-bit bignum and re-adds into an ever-larger bignum on each step, so the total decoding cost is superlinear (about O(N^2)). An unauthenticated attacker who can send an HTTP/2 header block to a server using this decoder (reached through the 'Elixir.HPAX':decode/2 entry point) can supply a small header block that forces a large, attacker-controlled amount of CPU (and transient memory), a denial-of-service amplification.\n\nThis issue affects hpax from 0.1.1 before 1.0.4."}, {"lang": "es", "value": "Una vulnerabilidad de complejidad algor\u00edtmica ineficiente en elixir-mint hpax permite una denegaci\u00f3n de servicio no autenticada a trav\u00e9s de la decodificaci\u00f3n de enteros HPACK sin l\u00edmites.\n\nhpax decodifica enteros HPACK de longitud variable sin un l\u00edmite superior en el valor decodificado o en el n\u00famero de octetos de continuaci\u00f3n. \u2019Elixir.HPAX.Types\u2019:decode_remaining_integer/3 acumula el entero como int + (value <<< m), desplazando 7 bits m\u00e1s por cada octeto de continuaci\u00f3n y deteni\u00e9ndose solo en un octeto de terminaci\u00f3n o entrada truncada, nunca porque el entero se hizo demasiado grande. Debido a que los enteros BEAM son de precisi\u00f3n arbitraria, una secuencia de N octetos de continuaci\u00f3n construye un bignum de O(N) bits y se vuelve a a\u00f1adir a un bignum cada vez m\u00e1s grande en cada paso, por lo que el costo total de decodificaci\u00f3n es superlineal (aproximadamente O(N^2)). Un atacante no autenticado que puede enviar un bloque de encabezado HTTP/2 a un servidor que utiliza este decodificador (alcanzado a trav\u00e9s del punto de entrada \u2019Elixir.HPAX\u2019:decode/2) puede proporcionar un peque\u00f1o bloque de encabezado que fuerza una gran cantidad de CPU (y memoria transitoria) controlada por el atacante, una amplificaci\u00f3n de denegaci\u00f3n de servicio.\n\nEste problema afecta a hpax desde la versi\u00f3n 0.1.1 anterior a la 1.0.4."}], "lastModified": "2026-10-25T20:10:00.147", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}