{"id":"CVE-2026-13575","kind":"vulnerability","aliases":["CVE-2026-13575"],"related":[],"title":"HTTP::Session Perl module: memcached command injection via session cookie","description":"HTTP::Session versions before 0.54 for Perl allow memcached command injection via unfiltered session ids in HTTP::Session::Store::CHI.\n\nThe session id from the client's cookie reaches the CHI cache unchanged. The sibling HTTP::Session::Store::Memcached rejects ids that contain control characters, but the CHI store has no such check, and CHI does not escape keys for its memcached drivers.\n\nWith a memcached driver, a CR and LF in the session id end the cache command early, and the server reads the bytes after them as further commands.","summary":"HTTP::Session before 0.54 passes the session id from a client's cookie unchanged into the CHI cache store. With a memcached driver, line break characters in that id let an attacker send extra memcached commands.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["chi","http-session","memcached","package","perl"],"not_affected_if":["no-perl","non-memcached-store"],"how_to_check":"- Check whether the installed HTTP::Session version is below `0.54` (for example with `perl -MHTTP::Session -e 'print $HTTP::Session::VERSION'`).\n- Check whether the application uses HTTP::Session::Store::CHI with a memcached driver.","fix":"- Move HTTP::Session to `0.54` or later.","status":"open","published_at":"2026-11-01T11:18:58+00:00","first_seen_at":"2026-11-01T11:49:50+00:00","triaged_at":"2026-11-01T11:50:04+00:00","updated_at":"2026-11-01T11:50:04+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-01T11:50:04Z","model":"claude-haiku-5-5","output":{"fix":"- Move HTTP::Session to `0.54` or later.","reach":"internet","title":"HTTP::Session Perl module: memcached command injection via session cookie","impact":"medium","summary":"HTTP::Session before 0.54 passes the session id from a client's cookie unchanged into the CHI cache store. With a memcached driver, line break characters in that id let an attacker send extra memcached commands.","audience":"developers","category":"package","nicknames":[],"who_cares":["perl","http-session","memcached","chi"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"attacker sends extra memcached commands, altering or reading cache data","analyst_note":"","how_to_check":"- Check whether the installed HTTP::Session version is below `0.54` (for example with `perl -MHTTP::Session -e 'print $HTTP::Session::VERSION'`).\n- Check whether the application uses HTTP::Session::Store::CHI with a memcached driver.","plain_action":"","needs_analyst":false,"not_affected_if":["non-memcached-store","no-perl"],"who_is_affected":"Applications that use HTTP::Session with the CHI session store backed by memcached are exposed, because the session id from the cookie reaches memcached without filtering. Applications using the Memcached store, which rejects control characters, or other stores are not affected by this description. Teams not running Perl web applications can skip it.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"unknown"},"cost_usd":0.000683,"input_tokens":4198,"output_tokens":527,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-13575':13A,16A '-2026':12A,15A '0.54':27B,64C 'allow':67C 'attack':55B 'break':48B 'byte':145C 'cach':41B,91C,137C 'charact':49B,104C 'check':112C 'chi':17B,40B,79C,90C,107C,114C 'client':34B,85C 'command':6A,59B,69C,138C,150C 'contain':102C 'control':103C 'cooki':10A,36B,87C 'cr':128C 'cve':11A,14A 'driver':46B,122C,126C 'earli':139C 'end':135C 'escap':117C 'extra':57B 'http':1A,19B,24B,60C,76C,95C 'http-session':18B 'id':31B,52B,74C,82C,100C,134C 'inject':7A,70C 'key':118C 'let':53B 'lf':130C 'line':47B 'memcach':5A,21B,45B,58B,68C,98C,121C,125C 'modul':4A 'packag':22B 'pass':28B 'perl':3A,23B,66C 'reach':88C 'read':143C 'reject':99C 'send':56B 'server':142C 'session':2A,9A,20B,25B,30B,61C,73C,77C,81C,96C,133C 'sibl':94C 'store':42B,78C,97C,108C 'unchang':37B,92C 'unfilt':72C 'version':62C 'via':8A,71C","nicknames":[],"mitigations":[],"who_affected":"Applications that use HTTP::Session with the CHI session store backed by memcached are exposed, because the session id from the cookie reaches memcached without filtering. Applications using the Memcached store, which rejects control characters, or other stores are not affected by this description. Teams not running Perl web applications can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"first_public_at":"2026-11-01T11:18:58+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-13575","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13575","severity":null,"published_at":"2026-11-01T11:18:58+00:00","modified_at":"2026-11-01T11:18:58+00:00","first_seen_at":"2026-11-01T11:49:50+00:00","fetched_at":"2026-11-01T11:49:50+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"}