{"id":"CVE-2026-113812","kind":"vulnerability","aliases":["CVE-2026-113812"],"related":[],"title":"Mozilla::CA Perl bundle trusts a root with publicly leaked intermediate keys","description":"Mozilla::CA versions before 20261020 for Perl provide a CA certificate bundle containing a root linked to compromised intermediates.\n\nThe bundle includes \"emSign ECC Root CA - G3\", which provides a trust path for intermediate certificates whose private keys are publicly available.\n\nAn attacker able to intercept or redirect client traffic may use these keys to impersonate a TLS server.\n\nLWP, HTTP::Tiny and other clients normally use IO::Socket::SSL, which looks for CA certificates in OpenSSL's default locations before falling back to Mozilla::CA.\n\nConfiguration and environment variables can override this selection. Users should check which CA store their client uses. If it uses the system store, check for and install the operating system vendor's updates for this incident.","summary":"Mozilla::CA versions before 20261020 ship a CA bundle containing the emSign ECC Root CA - G3, which chains to intermediate certificates whose private keys are publicly available. An attacker who can intercept or redirect client traffic could use those keys to impersonate a TLS server to affected Perl clients.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["mozilla-ca","package","perl","tls-clients"],"not_affected_if":["default-openssl-ca-path","system-ca-store-in-use"],"how_to_check":"- Run `perl -MMozilla::CA -e 'print $Mozilla::CA::VERSION'` or `cpanm --info Mozilla::CA` to read the installed version.\n- Check which CA store the client uses: the sources say IO::Socket::SSL looks in OpenSSL default locations before falling back to Mozilla::CA, and that configuration and environment variables can override this.","fix":"- Upgrade Mozilla::CA to `20261020` or later.\n- If the client uses the system store, install the operating system vendor's CA updates for this incident.","status":"open","published_at":"2026-10-20T22:19:30+00:00","first_seen_at":"2026-10-23T21:57:25+00:00","triaged_at":"2026-10-25T05:04:11+00:00","updated_at":"2026-10-25T05:04:11+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T05:04:11Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Mozilla::CA to `20261020` or later.\n- If the client uses the system store, install the operating system vendor's CA updates for this incident.","reach":"network","title":"Mozilla::CA Perl bundle trusts a root with publicly leaked intermediate keys","impact":"high","summary":"Mozilla::CA versions before 20261020 ship a CA bundle containing the emSign ECC Root CA - G3, which chains to intermediate certificates whose private keys are publicly available. An attacker who can intercept or redirect client traffic could use those keys to impersonate a TLS server to affected Perl clients.","category":"package","nicknames":[],"who_cares":["perl","mozilla-ca","tls-clients"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker impersonates a TLS server to a Perl client on an intercepted path","analyst_note":"Confirm which OS and OpenSSL CA paths apply and whether the emSign G3 root is in system stores; check the NVD entry and the Mozilla::CA release notes for the fixed version.","how_to_check":"- Run `perl -MMozilla::CA -e 'print $Mozilla::CA::VERSION'` or `cpanm --info Mozilla::CA` to read the installed version.\n- Check which CA store the client uses: the sources say IO::Socket::SSL looks in OpenSSL default locations before falling back to Mozilla::CA, and that configuration and environment variables can override this.","needs_analyst":true,"not_affected_if":["system-ca-store-in-use","default-openssl-ca-path"],"who_is_affected":"Perl applications using LWP, HTTP::Tiny or other clients that fall back to the Mozilla::CA bundle for TLS trust. Systems where IO::Socket::SSL finds CA certificates in OpenSSL's default locations are not using the bundle, and the sources do not say whether those locations are affected by the same root.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.0007,"input_tokens":3461,"output_tokens":708,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-113812':15A,18A '-2026':14A,17A '20261020':31B,80C 'abl':119C 'affect':73B 'attack':55B,118C 'avail':53B,116C 'back':158C 'bundl':4A,35B,87C,96C 'ca':2A,21B,28B,34B,41B,77C,85C,101C,149C,161C,174C 'certif':47B,86C,110C,150C 'chain':44B 'check':172C,185C 'client':26B,61B,75B,124C,140C,177C 'compromis':93C 'configur':162C 'contain':36B,88C 'could':63B 'cve':13A,16A 'default':154C 'ecc':39B,99C 'emsign':38B,98C 'environ':164C 'fall':157C 'g3':42B,102C 'http':136C 'imperson':68B,131C 'incid':197C 'includ':97C 'instal':188C 'intercept':58B,121C 'intermedi':11A,46B,94C,109C 'io':143C 'key':12A,50B,66B,113C,129C 'leak':10A 'link':91C 'locat':155C 'look':147C 'lwp':135C 'may':126C 'mozilla':1A,20B,27B,76C,160C 'mozilla-ca':19B 'normal':141C 'openssl':152C 'oper':190C 'overrid':167C 'packag':22B 'path':107C 'perl':3A,23B,74B,82C 'privat':49B,112C 'provid':83C,104C 'public':9A,52B,115C 'redirect':60B,123C 'root':7A,40B,90C,100C 'select':169C 'server':71B,134C 'ship':32B 'socket':144C 'ssl':145C 'store':175C,184C 'system':183C,191C 'tini':137C 'tls':25B,70B,133C 'tls-client':24B 'traffic':62B,125C 'trust':5A,106C 'updat':194C 'use':64B,127C,142C,178C,181C 'user':170C 'variabl':165C 'vendor':192C 'version':29B,78C 'whose':48B,111C","nicknames":[],"mitigations":[],"who_affected":"Perl applications using LWP, HTTP::Tiny or other clients that fall back to the Mozilla::CA bundle for TLS trust. Systems where IO::Socket::SSL finds CA certificates in OpenSSL's default locations are not using the bundle, and the sources do not say whether those locations are affected by the same root.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:19:30+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113812","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113812","severity":null,"published_at":"2026-10-20T22:19:30+00:00","modified_at":"2026-10-22T17:21:57+00:00","first_seen_at":"2026-10-23T21:57:25+00:00","fetched_at":"2026-10-23T22:29:00+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"}