{"id":"CVE-2026-93003","kind":"vulnerability","aliases":["CVE-2026-93003"],"related":[],"title":"Web add-on HTTP server reads headers from request body","description":"The Web add-on's HTTP server searches the entire request packet for header fields instead of stopping at the end of the header section. A header field name placed in the request body is therefore reported to the server as though it were a header, which lets a client control request framing decisions it should not be able to reach.","summary":"The Web add-on's HTTP server scans the whole request packet for header fields rather than stopping at the end of the header section. A header name placed in the body is treated as a real header, so a client can influence request framing it should not control.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["other","web-add-on"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-20T16:17:17+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","triaged_at":"2026-10-25T03:40:24+00:00","updated_at":"2026-10-25T03:40:24+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-10-25T03:40:24Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Web add-on HTTP server reads headers from request body","impact":"medium","summary":"The Web add-on's HTTP server scans the whole request packet for header fields rather than stopping at the end of the header section. A header name placed in the body is treated as a real header, so a client can influence request framing it should not control.","category":"other","nicknames":[],"who_cares":["web-add-on"],"confidence":0.4,"needs_auth":"unknown","worst_case":"Client controls request framing decisions the server should not honor","analyst_note":"Identify the product behind 'Web add-on' and its affected and fixed versions from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-93003.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000499,"input_tokens":3300,"output_tokens":337,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-93003':14A,17A 'abl':131C 'add':3A,21B,25B,75C 'add-on':2A,24B,74C 'bodi':11A,54B,106C 'client':63B,122C 'control':71B,123C 'cve':12A,15A 'decis':126C 'end':43B,93C 'entir':82C 'field':37B,87C,100C 'frame':67B,125C 'header':8A,36B,46B,49B,60B,86C,96C,99C,118C 'http':5A,28B,78C 'influenc':65B 'instead':88C 'let':120C 'name':50B,101C 'packet':34B,84C 'place':51B,102C 'rather':38B 'reach':133C 'read':7A 'real':59B 'report':109C 'request':10A,33B,66B,83C,105C,124C 'scan':30B 'search':80C 'section':47B,97C 'server':6A,29B,79C,112C 'stop':40B,90C 'therefor':108C 'though':114C 'treat':56B 'web':1A,20B,23B,73C 'web-add-on':19B 'whole':32B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T16:17:17+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"emo@eclipse.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-93003","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93003","severity":null,"published_at":"2026-10-20T16:17:17+00:00","modified_at":"2026-10-20T19:48:50+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","fetched_at":"2026-10-23T22:28:58+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}