{"id":"CVE-2026-121632","kind":"vulnerability","aliases":["CVE-2026-121632"],"related":[],"title":"Data::MuForm for Perl: form options rendered into HTML without escaping","description":"Data::MuForm versions through 0.05 for Perl render attribute values and option labels into HTML without escaping.\n\nprocess_attrs writes each attribute value into the markup as is. The select, radio group and checkbox group renderers pass each option to it, so an option's value becomes an unescaped attribute. Option and option group labels are also unescaped, the group label inside a label attribute and the others in element content.\n\nAny application whose option list is built from data rather than literals, using an options_<field_name> method, a build_options method or a DBIC model, allows attacker-influenced text in an option value or label that can embed JavaScript in rendered pages. Attribute values built from data, such as through element_attr, are affected the same way.","summary":"Data::MuForm versions through 0.05 write option values, labels and attribute values into rendered HTML without escaping them. An attacker who controls option text built from data can inject JavaScript that runs in a victim's browser when the page is viewed.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["data-muform","package","perl","web-forms"],"not_affected_if":["not-using-data-muform","static-option-literals"],"how_to_check":"- Check whether the project depends on `Data::MuForm` and at what version, for example with `cpanm --info Data::MuForm` or the Perl dependency list.\n- Look for forms that build select, radio or checkbox options from database rows, `options_<field_name>` methods, `build_options` methods, or `element_attr` values that include user-supplied text.","fix":null,"status":"open","published_at":"2026-11-04T15:17:42+00:00","first_seen_at":"2026-11-04T15:27:30+00:00","triaged_at":"2026-11-04T15:28:34+00:00","updated_at":"2026-11-04T15:28:34+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-04T15:28:34Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Data::MuForm for Perl: form options rendered into HTML without escaping","impact":"medium","summary":"Data::MuForm versions through 0.05 write option values, labels and attribute values into rendered HTML without escaping them. An attacker who controls option text built from data can inject JavaScript that runs in a victim's browser when the page is viewed.","audience":"developers","category":"package","nicknames":[],"who_cares":["perl","data-muform","web-forms"],"confidence":0.6,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Attacker script runs in other users' browsers on the site","analyst_note":"Check the NVD entry for the first fixed version and whether a patched release exists; the sources give no fix version.","how_to_check":"- Check whether the project depends on `Data::MuForm` and at what version, for example with `cpanm --info Data::MuForm` or the Perl dependency list.\n- Look for forms that build select, radio or checkbox options from database rows, `options_<field_name>` methods, `build_options` methods, or `element_attr` values that include user-supplied text.","plain_action":"","needs_analyst":true,"not_affected_if":["static-option-literals","not-using-data-muform"],"who_is_affected":"Applications that use Data::MuForm up to and including 0.05 and build option lists or attribute values from data rather than fixed literals, such as from a DBIC model or a database. Forms with only hard-coded option literals are not described as affected. Teams that do not use this Perl module can skip it.","user_interaction":"yes","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000712,"input_tokens":4241,"output_tokens":575,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121632':14A,17A '-2026':13A,16A '0.05':30B,72C 'affect':192C 'allow':163C 'also':124C 'applic':140C 'attack':45B,165C 'attacker-influenc':164C 'attr':86C,190C 'attribut':36B,76C,89C,117C,132C,181C 'becom':114C 'browser':62B 'build':156C 'built':50B,145C,183C 'checkbox':101C 'content':138C 'control':47B 'cve':12A,15A 'data':1A,19B,26B,52B,68C,147C,185C 'data-muform':18B 'dbic':161C 'element':137C,189C 'emb':176C 'escap':11A,42B,84C 'form':5A,25B 'group':99C,102C,121C,127C 'html':9A,40B,82C 'influenc':166C 'inject':54B 'insid':129C 'javascript':55B,177C 'label':34B,80C,122C,128C,131C,173C 'list':143C 'liter':150C 'markup':93C 'method':154C,158C 'model':162C 'muform':2A,20B,27B,69C 'option':6A,32B,48B,79C,106C,111C,118C,120C,142C,153C,157C,170C 'other':135C 'packag':21B 'page':65B,180C 'pass':104C 'perl':4A,22B,74C 'process':85C 'radio':98C 'rather':148C 'render':7A,39B,75C,103C,179C 'run':57B 'select':97C 'text':49B,167C 'unescap':116C,125C 'use':151C 'valu':33B,37B,77C,90C,113C,171C,182C 'version':28B,70C 'victim':60B 'view':67B 'way':195C 'web':24B 'web-form':23B 'whose':141C 'without':10A,41B,83C 'write':31B,87C","nicknames":[],"mitigations":[],"who_affected":"Applications that use Data::MuForm up to and including 0.05 and build option lists or attribute values from data rather than fixed literals, such as from a DBIC model or a database. Forms with only hard-coded option literals are not described as affected. Teams that do not use this Perl module can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["datamuform","medium","package","perl","webforms"],"campaign_type":null,"first_public_at":"2026-11-04T15:17:42+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121632","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121632","severity":null,"published_at":"2026-11-04T15:17:42+00:00","modified_at":"2026-11-04T15:17:42+00:00","first_seen_at":"2026-11-04T15:27:30+00:00","fetched_at":"2026-11-04T15:27:30+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"}