{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53430", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-06-09T11:01:47.529Z", "datePublished": "2026-06-15T21:55:33.707Z", "dateUpdated": "2026-06-15T21:55:33.707Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://hex.pm", "cpes": ["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.GRPC.Compressor.Gzip'", "'Elixir.GRPC.Message'"], "packageName": "grpc", "packageURL": "pkg:hex/grpc", "product": "grpc", "programFiles": ["lib/grpc/compressor/gzip.ex", "lib/grpc/message.ex"], "programRoutines": [{"name": "'Elixir.GRPC.Compressor.Gzip':decompress/1"}, {"name": "'Elixir.GRPC.Message':from_data/2"}], "repo": "https://github.com/elixir-grpc/grpc", "vendor": "elixir-grpc", "versions": [{"lessThan": "1.0.0", "status": "affected", "version": "0.4.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.GRPC.Compressor.Gzip'", "'Elixir.GRPC.Message'"], "packageName": "elixir-grpc/grpc", "packageURL": "pkg:github/elixir-grpc/grpc", "product": "grpc", "programFiles": ["lib/grpc/compressor/gzip.ex", "lib/grpc/message.ex"], "programRoutines": [{"name": "'Elixir.GRPC.Compressor.Gzip':decompress/1"}, {"name": "'Elixir.GRPC.Message':from_data/2"}], "repo": "https://github.com/elixir-grpc/grpc", "vendor": "elixir-grpc", "versions": [{"lessThan": "1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc", "status": "affected", "version": "beae6800fc8baf126f3fe7107d86a50e105275ba", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.0.0", "versionStartIncluding": "0.4.0", "vulnerable": true}], "negate": false, "operator": "AND"}], "operator": "OR"}], "credits": [{"lang": "en", "type": "finder", "value": "Peter Ullrich"}, {"lang": "en", "type": "remediation developer", "value": "Paulo Valente"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (<tt>GRPC.Compressor.Gzip</tt>, <tt>GRPC.Message</tt> modules) allows a denial of service via a gzip decompression bomb.</p><p>This vulnerability is associated with program files <tt>lib/grpc/compressor/gzip.ex</tt>, <tt>lib/grpc/message.ex</tt> and program routines <tt>'Elixir.GRPC.Compressor.Gzip':decompress/1</tt>, <tt>'Elixir.GRPC.Message':from_data/2</tt>.</p><p><tt>'Elixir.GRPC.Compressor.Gzip':decompress/1</tt> calls <tt>:zlib.gunzip/1</tt> directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip <tt>GRPC.Compressor</tt> implementation, it is invoked automatically whenever an incoming gRPC frame carries the <tt>grpc-encoding: gzip</tt> header. <tt>:zlib.gunzip/1</tt> allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The <tt>max_receive_message_length</tt> limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node's heap and trigger an out-of-memory kill.</p><p>This issue affects grpc: from 0.4.0 before 1.0.0.</p>"}], "value": "Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (GRPC.Compressor.Gzip, GRPC.Message modules) allows a denial of service via a gzip decompression bomb.\n\nThis vulnerability is associated with program files lib/grpc/compressor/gzip.ex, lib/grpc/message.ex and program routines 'Elixir.GRPC.Compressor.Gzip':decompress/1, 'Elixir.GRPC.Message':from_data/2.\n\n'Elixir.GRPC.Compressor.Gzip':decompress/1 calls :zlib.gunzip/1 directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip GRPC.Compressor implementation, it is invoked automatically whenever an incoming gRPC frame carries the grpc-encoding: gzip header. :zlib.gunzip/1 allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The max_receive_message_length limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node's heap and trigger an out-of-memory kill.\n\nThis issue affects grpc: from 0.4.0 before 1.0.0."}], "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}], "metrics": [{"cvssV4_0": {"attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 8.7, "baseSeverity": "HIGH", "privilegesRequired": "NONE", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "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": "NONE", "vulnIntegrityImpact": "NONE"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-409", "description": "CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-06-15T21:55:33.707Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-53430.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-53430"}, {"tags": ["patch"], "url": "https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc"}], "source": {"discovery": "EXTERNAL"}, "title": "grpc gzip decompression bomb in GRPC.Compressor.Gzip.decompress/1", "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-grpc grpc (GRPC.Compressor.Gzip, GRPC.Message modules) allows a denial of service via a gzip decompression bomb.\n\nThis vulnerability is associated with program files lib/grpc/compressor/gzip.ex, lib/grpc/message.ex and program routines 'Elixir.GRPC.Compressor.Gzip':decompress/1, 'Elixir.GRPC.Message':from_data/2.\n\n'Elixir.GRPC.Compressor.Gzip':decompress/1 calls :zlib.gunzip/1 directly on attacker-controlled bytes with no decompressed-size limit, ratio check, or incremental decoding. Because this module is the registered gzip GRPC.Compressor implementation, it is invoked automatically whenever an incoming gRPC frame carries the grpc-encoding: gzip header. :zlib.gunzip/1 allocates the entire decompressed result as a single binary, so a small highly compressible payload (for example a few kilobytes of zeros, which gzip compresses at roughly 1000:1) expands to multiple gigabytes inside a single call. The max_receive_message_length limit is enforced only against the already-decompressed message, so it provides no protection. An unauthenticated remote peer can send a single crafted frame to exhaust the BEAM node's heap and trigger an out-of-memory kill.\n\nThis issue affects grpc: from 0.4.0 before 1.0.0."}], "id": "CVE-2026-53430", "lastModified": "2026-06-15T23:16:46.363", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "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/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}, "published": "2026-06-15T23:16:46.363", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-53430.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/elixir-grpc/grpc/commit/1afbab9d57d2a3e16ca9c62ffa4923338ea96cfc"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-6ccx-9c9f-327w"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-53430"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-409"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}