{"id":"CVE-2026-112067","kind":"vulnerability","aliases":["CVE-2026-112067"],"related":[],"title":"CAPTCHA extension leaks its answer inside the image, letting bots pass","description":"The extension hides the correct answer to each CAPTCHA inside the image data of the CAPTCHA itself. Anyone who can request a CAPTCHA image can read the answer from it and submit it, so automated clients can pass the challenge. This applies to the default configuration, because the audio feature that causes the answer to be embedded is enabled by default. Forms that rely on the CAPTCHA as their only protection against automated submissions are exposed to abuse by bots.","summary":"The extension embeds the correct answer to each CAPTCHA inside the image data it serves. Anyone who requests a CAPTCHA image can read the answer and submit it, so automated clients can pass the challenge.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["captcha","forms","other","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-20T10:17:03+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","triaged_at":"2026-10-25T03:40:33+00:00","updated_at":"2026-10-25T03:40:33+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-25T03:40:33Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"internet","title":"CAPTCHA extension leaks its answer inside the image, letting bots pass","impact":"low","summary":"The extension embeds the correct answer to each CAPTCHA inside the image data it serves. Anyone who requests a CAPTCHA image can read the answer and submit it, so automated clients can pass the challenge.","category":"other","nicknames":[],"who_cares":["captcha","forms","self-hosted"],"confidence":0.5,"needs_auth":"no","worst_case":"Bots pass CAPTCHA challenges and flood protected forms with submissions","analyst_note":"Identify the extension and affected versions from the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-112067 and find the fixed release.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":["default-config"],"who_is_affected":"Sites that use this CAPTCHA extension as their only protection against automated form submissions are exposed, since the audio feature that embeds the answer is enabled by default. Sites that use another CAPTCHA provider, or that add rate limiting or other bot controls beyond the CAPTCHA, are less exposed. The sources do not name the extension or the versions affected.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000572,"input_tokens":3364,"output_tokens":472,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112067':14A,17A '-2026':13A,16A 'abus':136C 'answer':5A,29B,48B,64C,86C,112C 'anyon':39B,76C 'appli':100C 'audio':107C 'autom':53B,93C,131C 'bot':10A,138C 'captcha':1A,18B,32B,43B,67C,74C,81C,125C 'caus':110C 'challeng':58B,98C 'client':54B,94C 'configur':104C 'correct':28B,63C 'cve':12A,15A 'data':36B,71C 'default':103C,119C 'emb':26B 'embed':115C 'enabl':117C 'expos':134C 'extens':2A,25B,60C 'featur':108C 'form':19B,120C 'hide':61C 'host':23B 'imag':8A,35B,44B,70C,82C 'insid':6A,33B,68C 'leak':3A 'let':9A 'pass':11A,56B,96C 'protect':129C 'read':46B,84C 'reli':122C 'request':41B,79C 'self':22B 'self-host':21B 'serv':38B 'submiss':132C 'submit':50B,90C","nicknames":[],"mitigations":[],"who_affected":"Sites that use this CAPTCHA extension as their only protection against automated form submissions are exposed, since the audio feature that embeds the answer is enabled by default. Sites that use another CAPTCHA provider, or that add rate limiting or other bot controls beyond the CAPTCHA, are less exposed. The sources do not name the extension or the versions affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T10:17:03+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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":"f4fb688c-4412-4426-b4b8-421ecf27b14a","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-112067","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112067","severity":null,"published_at":"2026-10-20T10:17:03+00:00","modified_at":"2026-10-20T19:28:52+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","fetched_at":"2026-10-23T22:28:57+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"}