{"schema":"threatline.record/2","record":{"id":"CVE-2026-100676","aliases":["GHSA-qv38-hwhv-jm49"],"summary":"stoatchat before 0.15.5 Local Filesystem Read via SVG","details":"January, the media proxy/embed service of stoatchat (stoatchat/stoatchat), before version 0.15.5 improperly resolves SVG <image href> values as local filesystem paths when a fetched resource is served as image/svg+xml. An unauthenticated remote attacker who causes the service to proxy an attacker-hosted SVG (e.g. via the /proxy endpoint) can determine whether local files exist through observable response-time differences, and can cause supported local image files to be disclosed after re-encoding. Because each referenced file is read in full with no effective limit on the number or total volume of reads, a single request can also generate an unbounded amount of local filesystem I/O and memory pressure (the published proof of concept drives about 4.34 GB of reads), leading to denial of service. The issue is fixed in 0.15.5.","categories":["Unclassified"],"product":"stoatchat","vendor":"stoatchat","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100676","source_modified_at":"2026-09-28T16:33:08.727Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"stoatchat","vendor":"stoatchat","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"0.15.5"},{"version":"0.15.5","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100676","source_modified_at":"2026-09-28T16:33:08.727Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"stoatchat","ecosystem":null},"version":"0.15.5","basis":"first unaffected version stated in the CVE record"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00397,"percentile":0.32703,"score_date":"2026-10-23"},"published_at":"2026-09-26T13:23:39.014Z","modified_at":"2026-09-28T16:33:08.727Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100676","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-28T16:33:08.727Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100676","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/stoatchat/stoatchat/security/advisories/GHSA-qv38-hwhv-jm49","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-local-filesystem-read-via-svg","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-28T16:32:41.399938Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-28T16:33:08.727Z","content_hash":"44dec9478c176091de476f06f0359d73e59ab0467d8c4984901c1a06662e4169"}}