{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-32873", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-16T21:03:44.419Z", "datePublished": "2026-03-20T01:13:39.665Z", "dateUpdated": "2026-03-20T01:13:39.665Z"}, "containers": {"cna": {"title": "ewe: Loop with Unreachable Exit Condition ('Infinite Loop')", "problemTypes": [{"descriptions": [{"cweId": "CWE-825", "lang": "en", "description": "CWE-825: Expired Pointer Dereference", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/vshakitskiy/ewe/security/advisories/GHSA-4w98-xf39-23gp", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/vshakitskiy/ewe/security/advisories/GHSA-4w98-xf39-23gp"}, {"name": "https://github.com/vshakitskiy/ewe/commit/8513de9dcdd0005f727c0f6f15dd89f8d626f560", "tags": ["x_refsource_MISC"], "url": "https://github.com/vshakitskiy/ewe/commit/8513de9dcdd0005f727c0f6f15dd89f8d626f560"}, {"name": "https://github.com/vshakitskiy/ewe/commit/d8b9b8a86470c0cb5696647997c2f34763506e37", "tags": ["x_refsource_MISC"], "url": "https://github.com/vshakitskiy/ewe/commit/d8b9b8a86470c0cb5696647997c2f34763506e37"}], "affected": [{"vendor": "vshakitskiy", "product": "ewe", "versions": [{"version": ">= 0.8.0, < 3.0.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-20T01:13:39.665Z"}, "descriptions": [{"lang": "en", "value": "ewe is a Gleam web server. Versions 0.8.0 through 3.0.4 contain a bug in the handle_trailers function where rejected trailer headers (forbidden or undeclared) cause an infinite loop. When handle_trailers encounters such a trailer, three code paths (lines 520, 523, 526) recurse with the original buffer (rest) instead of advancing past the rejected header (Buffer(header_rest, 0)), causing decoder.decode_packet to re-parse the same header on every iteration. The resulting loop has no timeout or escape \u2014 the BEAM process permanently wedges at 100% CPU. Any application that calls ewe.read_body on chunked requests is affected, and this is exploitable by any unauthenticated remote client before control returns to application code, making an application-level workaround impossible. This issue is fixed in version 3.0.5."}], "source": {"advisory": "GHSA-4w98-xf39-23gp", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "ewe is a Gleam web server. Versions 0.8.0 through 3.0.4 contain a bug in the handle_trailers function where rejected trailer headers (forbidden or undeclared) cause an infinite loop. When handle_trailers encounters such a trailer, three code paths (lines 520, 523, 526) recurse with the original buffer (rest) instead of advancing past the rejected header (Buffer(header_rest, 0)), causing decoder.decode_packet to re-parse the same header on every iteration. The resulting loop has no timeout or escape \u2014 the BEAM process permanently wedges at 100% CPU. Any application that calls ewe.read_body on chunked requests is affected, and this is exploitable by any unauthenticated remote client before control returns to application code, making an application-level workaround impossible. This issue is fixed in version 3.0.5."}], "id": "CVE-2026-32873", "lastModified": "2026-03-20T02:16:35.540", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-20T02:16:35.540", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/vshakitskiy/ewe/commit/8513de9dcdd0005f727c0f6f15dd89f8d626f560"}, {"source": "security-advisories@github.com", "url": "https://github.com/vshakitskiy/ewe/commit/d8b9b8a86470c0cb5696647997c2f34763506e37"}, {"source": "security-advisories@github.com", "url": "https://github.com/vshakitskiy/ewe/security/advisories/GHSA-4w98-xf39-23gp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-825"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.8.0,3.0.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "ewe", "source": "cna", "vendor": "vshakitskiy"}, "product": "ewe", "vendor": "vshakitskiy"}], "analysis": {"en": {"generated_at": "2026-03-20T03:31:29.579210+00:00", "value": {"mitigation_remediation": ["Upgrade ewe to version 3.0.5 or newer"], "summary": {"action": "Patch Now", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The affected product is the vshakitskiy:ewe Gleam web server. Versions 0.8.0 through 3.0.4 are vulnerable. Any deployment that calls ewe.read_body on chunked requests will exercise the buggy code path.", "description_and_impact": "Key detail from CVE description: The handle_trailers function in ewe versions 0.8.0 through 3.0.4 loops indefinitely when parsing rejected trailer headers, causing the BEAM process to consume 100% CPU and remain unresponsive. This is a logical control flaw (CWE-825) that results in a denial of service. The vulnerability is exploitable by any unauthenticated remote client before application code runs, preventing normal request handling and making application-level mitigations ineffective.", "risk_and_exploitability": "The CVSS score is 7.5, indicating high severity. No EPSS data is available, and the issue is not listed in CISA's KEV catalog. Exploitability requires an unauthenticated client to send a request containing forbidden or undeclared trailer headers in a chunked payload. Once triggered, the process enters a permanent loop with no timeout, leading to a lasting denial of service. Because the attack can occur before the application code is reached, a workaround at the application layer is not possible."}}}}, "created": "2026-03-20T08:53:39.754284+00:00", "updated": "2026-03-20T10:43:32.617033+00:00", "vendors": ["vshakitskiy", "vshakitskiy$PRODUCT$ewe"]}