Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/97019?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/97019?format=api", "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=api", "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=api", "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=api", "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=api", "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=api", "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=api", "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=api", "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=api", "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=api", "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": "0.16546", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00053", "scoring_system": "epss", "scoring_elements": "0.16609", "published_at": "2026-04-04T12:55:00Z" }, { "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": "0.00121", "scoring_system": "epss", "scoring_elements": "0.31129", "published_at": "2026-04-13T12:55:00Z" } ], "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" }