{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/97019?format=json","vulnerability_id":"VCID-h1k4-x8vr-5bch","summary":"Improper Handling of Highly Compressed Data (Compression Bomb) vulnerability in Erlang OTP ssh (ssh_transport modules) allows Denial of Service via Resource Depletion.  The SSH transport layer advertises legacy zlib compression by default and inflates attacker-controlled payloads pre-authentication without any size limit, enabling reliable memory exhaustion DoS.  Two compression algorithms are affected:  * zlib: Activates immediately after key exchange, enabling unauthenticated attacks * zlib@openssh.com: Activates post-authentication, enabling authenticated attacks  Each SSH packet can decompress ~255 MB from 256 KB of wire data (1029:1 amplification ratio). Multiple packets can rapidly exhaust available memory, causing OOM kills in memory-constrained environments.  This vulnerability is associated with program files lib/ssh/src/ssh_transport.erl and program routines ssh_transport:decompress/2, ssh_transport:handle_packet_part/4.  This issue affects OTP from OTP 17.0 until OTP 28.4.1, 27.3.4.9 and 26.2.5.18 corresponding to ssh from 3.0.1 until 5.5.1, 5.2.11.6 and 5.1.4.14.","aliases":[{"alias":"CVE-2026-23943"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/584331?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.9%2Bdfsg-1?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-gcn7-ak4r-eba3"},{"vulnerability":"VCID-j7t3-nrjj-pfgp"},{"vulnerability":"VCID-zegc-rj1x-ryau"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.9%252Bdfsg-1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/1059948?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.10%2Bdfsg-1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.10%252Bdfsg-1"},{"url":"http://public2.vulnerablecode.io/api/packages/1059607?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.10%2Bdfsg-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.10%252Bdfsg-1%3Fdistro=trixie"}],"affected_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/582521?format=json","purl":"pkg:deb/debian/erlang@1:23.2.6%2Bdfsg-1%2Bdeb11u1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1283-nvxm-r7cw"},{"vulnerability":"VCID-28fj-t5hy-x3gn"},{"vulnerability":"VCID-c3vm-u9jn-83cs"},{"vulnerability":"VCID-gcn7-ak4r-eba3"},{"vulnerability":"VCID-h1k4-x8vr-5bch"},{"vulnerability":"VCID-j7t3-nrjj-pfgp"},{"vulnerability":"VCID-jg37-ud9r-d3h7"},{"vulnerability":"VCID-jxzt-8wru-6yhk"},{"vulnerability":"VCID-jzn6-bzzf-nugp"},{"vulnerability":"VCID-nqfj-97y5-suar"},{"vulnerability":"VCID-s9qn-9qdm-j7ej"},{"vulnerability":"VCID-tnt7-d764-13cq"},{"vulnerability":"VCID-vqnt-uyex-87fn"},{"vulnerability":"VCID-w9yj-xg82-kyac"},{"vulnerability":"VCID-wwcj-hwqc-f3g7"},{"vulnerability":"VCID-xcks-117s-v3dd"},{"vulnerability":"VCID-z6gs-aq96-gkaw"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:23.2.6%252Bdfsg-1%252Bdeb11u1"},{"url":"http://public2.vulnerablecode.io/api/packages/584328?format=json","purl":"pkg:deb/debian/erlang@1:23.2.6%2Bdfsg-1%2Bdeb11u1?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-28fj-t5hy-x3gn"},{"vulnerability":"VCID-gcn7-ak4r-eba3"},{"vulnerability":"VCID-h1k4-x8vr-5bch"},{"vulnerability":"VCID-j7t3-nrjj-pfgp"},{"vulnerability":"VCID-s9qn-9qdm-j7ej"},{"vulnerability":"VCID-w9yj-xg82-kyac"},{"vulnerability":"VCID-wwcj-hwqc-f3g7"},{"vulnerability":"VCID-xcks-117s-v3dd"},{"vulnerability":"VCID-z6gs-aq96-gkaw"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:23.2.6%252Bdfsg-1%252Bdeb11u1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/582522?format=json","purl":"pkg:deb/debian/erlang@1:25.2.3%2Bdfsg-1%2Bdeb12u3","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1283-nvxm-r7cw"},{"vulnerability":"VCID-28fj-t5hy-x3gn"},{"vulnerability":"VCID-c3vm-u9jn-83cs"},{"vulnerability":"VCID-gcn7-ak4r-eba3"},{"vulnerability":"VCID-h1k4-x8vr-5bch"},{"vulnerability":"VCID-j7t3-nrjj-pfgp"},{"vulnerability":"VCID-jxzt-8wru-6yhk"},{"vulnerability":"VCID-s9qn-9qdm-j7ej"},{"vulnerability":"VCID-w9yj-xg82-kyac"},{"vulnerability":"VCID-wwcj-hwqc-f3g7"},{"vulnerability":"VCID-xcks-117s-v3dd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:25.2.3%252Bdfsg-1%252Bdeb12u3"},{"url":"http://public2.vulnerablecode.io/api/packages/584329?format=json","purl":"pkg:deb/debian/erlang@1:25.2.3%2Bdfsg-1%2Bdeb12u3?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-1283-nvxm-r7cw"},{"vulnerability":"VCID-28fj-t5hy-x3gn"},{"vulnerability":"VCID-c3vm-u9jn-83cs"},{"vulnerability":"VCID-gcn7-ak4r-eba3"},{"vulnerability":"VCID-h1k4-x8vr-5bch"},{"vulnerability":"VCID-j7t3-nrjj-pfgp"},{"vulnerability":"VCID-jxzt-8wru-6yhk"},{"vulnerability":"VCID-s9qn-9qdm-j7ej"},{"vulnerability":"VCID-w9yj-xg82-kyac"},{"vulnerability":"VCID-wwcj-hwqc-f3g7"},{"vulnerability":"VCID-xcks-117s-v3dd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:25.2.3%252Bdfsg-1%252Bdeb12u3%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/582523?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.1%2Bdfsg-1%2Bdeb13u1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-gcn7-ak4r-eba3"},{"vulnerability":"VCID-h1k4-x8vr-5bch"},{"vulnerability":"VCID-j7t3-nrjj-pfgp"},{"vulnerability":"VCID-s9qn-9qdm-j7ej"},{"vulnerability":"VCID-w9yj-xg82-kyac"},{"vulnerability":"VCID-wwcj-hwqc-f3g7"},{"vulnerability":"VCID-zegc-rj1x-ryau"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.1%252Bdfsg-1%252Bdeb13u1"},{"url":"http://public2.vulnerablecode.io/api/packages/584330?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.1%2Bdfsg-1%2Bdeb13u1?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-gcn7-ak4r-eba3"},{"vulnerability":"VCID-h1k4-x8vr-5bch"},{"vulnerability":"VCID-j7t3-nrjj-pfgp"},{"vulnerability":"VCID-s9qn-9qdm-j7ej"},{"vulnerability":"VCID-w9yj-xg82-kyac"},{"vulnerability":"VCID-wwcj-hwqc-f3g7"},{"vulnerability":"VCID-zegc-rj1x-ryau"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.1%252Bdfsg-1%252Bdeb13u1%3Fdistro=trixie"}],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-23943","reference_id":"","reference_type":"","scores":[{"value":"0.00053","scoring_system":"epss","scoring_elements":"0.16609","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00053","scoring_system":"epss","scoring_elements":"0.16546","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00121","scoring_system":"epss","scoring_elements":"0.31129","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00121","scoring_system":"epss","scoring_elements":"0.31173","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00121","scoring_system":"epss","scoring_elements":"0.31217","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00121","scoring_system":"epss","scoring_elements":"0.31212","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00121","scoring_system":"epss","scoring_elements":"0.31181","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00121","scoring_system":"epss","scoring_elements":"0.31128","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00132","scoring_system":"epss","scoring_elements":"0.3277","published_at":"2026-04-16T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-23943"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-23943","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-23943"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/erlang/otp/commit/0c1c04b191f6ab940e8fcfabce39eb5a8a6440a4","reference_id":"0c1c04b191f6ab940e8fcfabce39eb5a8a6440a4","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-13T16:01:40Z/"}],"url":"https://github.com/erlang/otp/commit/0c1c04b191f6ab940e8fcfabce39eb5a8a6440a4"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130912","reference_id":"1130912","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130912"},{"reference_url":"https://github.com/erlang/otp/commit/43a87b949bdff12d629a8c34146711d9da93b1b1","reference_id":"43a87b949bdff12d629a8c34146711d9da93b1b1","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-13T16:01:40Z/"}],"url":"https://github.com/erlang/otp/commit/43a87b949bdff12d629a8c34146711d9da93b1b1"},{"reference_url":"https://github.com/erlang/otp/commit/93073c3bd338c60cd2bae715ce6a1d4ffc1a8fd3","reference_id":"93073c3bd338c60cd2bae715ce6a1d4ffc1a8fd3","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-13T16:01:40Z/"}],"url":"https://github.com/erlang/otp/commit/93073c3bd338c60cd2bae715ce6a1d4ffc1a8fd3"},{"reference_url":"https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*","reference_id":"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*","reference_type":"","scores":[],"url":"https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"},{"reference_url":"https://cna.erlef.org/cves/CVE-2026-23943.html","reference_id":"CVE-2026-23943.html","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-13T16:01:40Z/"}],"url":"https://cna.erlef.org/cves/CVE-2026-23943.html"},{"reference_url":"https://osv.dev/vulnerability/EEF-CVE-2026-23943","reference_id":"EEF-CVE-2026-23943","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-13T16:01:40Z/"}],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-23943"},{"reference_url":"https://github.com/erlang/otp/security/advisories/GHSA-c836-qprm-jw9r","reference_id":"GHSA-c836-qprm-jw9r","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-13T16:01:40Z/"}],"url":"https://github.com/erlang/otp/security/advisories/GHSA-c836-qprm-jw9r"},{"reference_url":"https://www.erlang.org/doc/system/versions.html#order-of-versions","reference_id":"versions.html#order-of-versions","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-13T16:01:40Z/"}],"url":"https://www.erlang.org/doc/system/versions.html#order-of-versions"}],"weaknesses":[{"cwe_id":409,"name":"Improper Handling of Highly Compressed Data (Data Amplification)","description":"The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output."}],"exploits":[],"severity_range_score":"5.3 - 6.9","exploitability":"0.5","weighted_severity":"6.2","risk_score":3.1,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-h1k4-x8vr-5bch"}