{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/66631?format=json","vulnerability_id":"VCID-2wmc-yahz-pbcj","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/93543?format=json","purl":"pkg:deb/debian/erlang@1:23.2.6%2Bdfsg-1%2Bdeb11u1?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-2uh8-nhph-gfb6"},{"vulnerability":"VCID-883b-48uw-6yag"},{"vulnerability":"VCID-b3hg-mjga-nbg1"},{"vulnerability":"VCID-dazh-ypb5-akfp"},{"vulnerability":"VCID-dccw-cx8r-r7a1"},{"vulnerability":"VCID-ryy7-f45d-yyhv"},{"vulnerability":"VCID-wsby-unw4-zqe7"},{"vulnerability":"VCID-yyfx-f783-fqgk"}],"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/93570?format=json","purl":"pkg:deb/debian/erlang@1:23.2.6%2Bdfsg-1%2Bdeb11u4?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:23.2.6%252Bdfsg-1%252Bdeb11u4%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/93541?format=json","purl":"pkg:deb/debian/erlang@1:25.2.3%2Bdfsg-1%2Bdeb12u4?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-2uh8-nhph-gfb6"},{"vulnerability":"VCID-883b-48uw-6yag"},{"vulnerability":"VCID-b3hg-mjga-nbg1"},{"vulnerability":"VCID-dazh-ypb5-akfp"},{"vulnerability":"VCID-ryy7-f45d-yyhv"},{"vulnerability":"VCID-wsby-unw4-zqe7"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:25.2.3%252Bdfsg-1%252Bdeb12u4%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/93545?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.1%2Bdfsg-1%2Bdeb13u2?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-2uh8-nhph-gfb6"},{"vulnerability":"VCID-883b-48uw-6yag"},{"vulnerability":"VCID-aqqx-g7d3-1yfy"},{"vulnerability":"VCID-dazh-ypb5-akfp"},{"vulnerability":"VCID-n6dc-39d1-83cr"},{"vulnerability":"VCID-ryy7-f45d-yyhv"},{"vulnerability":"VCID-wsby-unw4-zqe7"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.1%252Bdfsg-1%252Bdeb13u2%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/93572?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.9%2Bdfsg-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.9%252Bdfsg-1%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/93544?format=json","purl":"pkg:deb/debian/erlang@1:27.3.4.12%2Bdfsg-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/erlang@1:27.3.4.12%252Bdfsg-1%3Fdistro=trixie"}],"affected_packages":[],"references":[{"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"}],"weaknesses":[],"exploits":[],"severity_range_score":null,"exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-2wmc-yahz-pbcj"}