{"id":"CVE-2026-114457","kind":"vulnerability","aliases":["CVE-2026-114457"],"related":[],"title":"mod_qos: crafted JSON request crashes Apache worker process","description":"A flaw was found in mod_qos. An unauthenticated remote attacker could cause a Denial of Service (DoS) by sending a specially crafted JSON request when JSON body filtering is enabled. Due to improper string termination during the processing of percent-encoded input, the module reads past allocated memory boundaries, which can cause an Apache worker process to crash.","summary":"mod_qos, an Apache module, reads past allocated memory when it processes percent-encoded input in JSON body filtering. An unauthenticated remote attacker can send a crafted JSON request to crash an Apache worker process, causing denial of service.","severity":"low","cvss":3.7,"epss":0.0028,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apache","mod_qos","runtime","self-hosted"],"not_affected_if":["default-config","no-mod_qos"],"how_to_check":"- Check whether the `mod_qos` module is loaded in the Apache configuration (`apachectl -M | grep qos`).\n- Check whether JSON body filtering is enabled in the mod_qos configuration (unknown which directive the sources name).","fix":null,"status":"open","published_at":"2026-10-22T07:16:42+00:00","first_seen_at":"2026-10-23T21:57:30+00:00","triaged_at":"2026-10-25T04:43:24+00:00","updated_at":"2026-10-25T04:43:24+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-25T04:43:24Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"mod_qos: crafted JSON request crashes Apache worker process","impact":"low","summary":"mod_qos, an Apache module, reads past allocated memory when it processes percent-encoded input in JSON body filtering. An unauthenticated remote attacker can send a crafted JSON request to crash an Apache worker process, causing denial of service.","category":"runtime","nicknames":[],"who_cares":["apache","mod_qos","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Apache worker process crashes, causing denial of service","analyst_note":"Find the fixed mod_qos version and the exact JSON body filtering directive in the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-114457.","how_to_check":"- Check whether the `mod_qos` module is loaded in the Apache configuration (`apachectl -M | grep qos`).\n- Check whether JSON body filtering is enabled in the mod_qos configuration (unknown which directive the sources name).","needs_analyst":true,"not_affected_if":["default-config","no-mod_qos"],"who_is_affected":"Servers running Apache with mod_qos where JSON body filtering is enabled are exposed, since the flaw is in that processing path. Servers without mod_qos, or with JSON body filtering turned off, are not affected according to the description.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"low"},"cost_usd":0.000596,"input_tokens":3348,"output_tokens":522,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-114457':12A,15A '-2026':11A,14A 'alloc':30B,111C 'apach':7A,16B,26B,56B,118C 'attack':46B,73C 'bodi':41B,90C 'boundari':113C 'caus':59B,75C,116C 'could':74C 'craft':3A,50B,85C 'crash':6A,54B,122C 'cve':10A,13A 'denial':60B,77C 'dos':80C 'due':94C 'enabl':93C 'encod':37B,105C 'filter':42B,91C 'flaw':64C 'found':66C 'host':22B 'improp':96C 'input':38B,106C 'json':4A,40B,51B,86C,89C 'memori':31B,112C 'mod':1A,17B,23B,68C 'modul':27B,108C 'past':29B,110C 'percent':36B,104C 'percent-encod':35B,103C 'process':9A,34B,58B,101C,120C 'qos':2A,18B,24B,69C 'read':28B,109C 'remot':45B,72C 'request':5A,52B,87C 'runtim':19B 'self':21B 'self-host':20B 'send':48B,82C 'servic':62B,79C 'special':84C 'string':97C 'termin':98C 'unauthent':44B,71C 'worker':8A,57B,119C","nicknames":[],"mitigations":[],"who_affected":"Servers running Apache with mod_qos where JSON body filtering is enabled are exposed, since the flaw is in that processing path. Servers without mod_qos, or with JSON body filtering turned off, are not affected according to the description.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-22T07:16:42+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cvss_by":"patrick@puiterwijk.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-114457","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114457","severity":null,"published_at":"2026-10-22T07:16:42+00:00","modified_at":"2026-10-22T17:21:57+00:00","first_seen_at":"2026-10-23T21:57:30+00:00","fetched_at":"2026-10-23T22:29:02+00:00","note":null},{"source":"epss","external_id":"CVE-2026-114457","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114457","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:51+00:00","fetched_at":"2026-10-24T07:15:51+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"}