CVE ID :CVE-2026-49755<\/p>\n
Published : June 8, 2026, 4:16 p.m. | 17\u00a0minutes ago<\/p>\n
Description :Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in wojtekmach Req allows attacker-controlled HTTP servers to exhaust memory in a Req client via decompression-bomb response bodies.<\/p>\n
Req’s default response pipeline includes Req.Steps.decode_body\/1 and Req.Steps.decompress_body\/1 in lib\/req\/steps.ex. decode_body\/1 dispatches on the server-supplied content-type (or URL extension) and calls :zip.extract(body, [:memory]) for application\/zip, :erl_tar.extract({:binary, body}, [:memory]) for application\/x-tar, and :erl_tar.extract({:binary, body}, [:memory, :compressed]) for application\/gzip \/ .tgz. Each returns the full decompressed archive contents as a [{name, bytes}] list in memory, with no per-entry or total size cap. decompress_body\/1 walks the content-encoding header and chains :zlib\/:brotli\/:ezstd decoders, so a response advertising content-encoding: gzip, gzip, gzip inflates through multiple layers without bound.<\/p>\n
Both steps are enabled by default, no caller opt-in is required, and the attacker controls the content-type and content-encoding headers on their own server (or on any host reached via Req’s automatic redirect following). A sub-megabyte response can expand to multiple gigabytes on the victim, crashing the BEAM process.<\/p>\n
This issue affects req: from 0.1.0 before 0.6.1.<\/p>\n
Severity: 8.2 | HIGH<\/p>\n
Visit the link for more details, such as CVSS details, affected products, timeline, and more…\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"
CVE ID :CVE-2026-49755 Published : June 8, 2026, 4:16 p.m. | 17\u00a0minutes ago Description :Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in wojtekmach Req allows attacker-controlled HTTP servers to exhaust memory in a Req client via decompression-bomb response bodies. Req’s default response pipeline includes Req.Steps.decode_body\/1 and Req.Steps.decompress_body\/1 in lib\/req\/steps.ex. decode_body\/1 dispatches on the …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-79463","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/79463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=79463"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/79463\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=79463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=79463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=79463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}