{"id":"CVE-2026-112056","kind":"vulnerability","aliases":["CVE-2026-112056"],"related":[],"title":"wvWare wv: crafted Word file crashes apps via heap out-of-bounds read","description":"wvWare wv through 1.2.9 contains a heap-based out-of-bounds read vulnerability in wvGetSTSH in stylesheet.c that allows attackers to crash applications by supplying crafted Word stylesheets. Attackers can provide a .doc file with ten or fewer styles or out-of-range style base indexes to read past heap arrays, crashing applications such as AbiWord.","summary":"wvWare's wv library has a heap out-of-bounds read in wvGetSTSH when parsing Word stylesheets. A crafted .doc file with ten or fewer styles or out-of-range base indexes makes the reading application crash, as demonstrated with AbiWord.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["abiword","document-conversion","package","self-hosted","wv","wvware"],"not_affected_if":["no-doc-parsing","no-untrusted-input"],"how_to_check":"- Check whether any application in your stack links the wv or wvWare library, such as AbiWord, or uses a converter built on it.\n- unknown for the exact package and version names in the sources.","fix":"- unknown: the sources do not name a fixed wv version. Check the wv project for a release newer than `1.2.9`.\n- Until patched, do not open untrusted .doc files with wv-based converters.","status":"open","published_at":"2026-10-18T13:16:37+00:00","first_seen_at":"2026-10-23T21:57:15+00:00","triaged_at":"2026-10-25T03:44:58+00:00","updated_at":"2026-10-25T03:44:58+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:44:58Z","model":"claude-haiku-5-5","output":{"fix":"- unknown: the sources do not name a fixed wv version. Check the wv project for a release newer than `1.2.9`.\n- Until patched, do not open untrusted .doc files with wv-based converters.","reach":"unknown","title":"wvWare wv: crafted Word file crashes apps via heap out-of-bounds read","impact":"low","summary":"wvWare's wv library has a heap out-of-bounds read in wvGetSTSH when parsing Word stylesheets. A crafted .doc file with ten or fewer styles or out-of-range base indexes makes the reading application crash, as demonstrated with AbiWord.","category":"package","nicknames":[],"who_cares":["wvware","wv","abiword","document-conversion","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Application crashes when a crafted Word file is parsed","analyst_note":"Confirm the fixed wv version and whether any code execution is possible; check the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-112056.","how_to_check":"- Check whether any application in your stack links the wv or wvWare library, such as AbiWord, or uses a converter built on it.\n- unknown for the exact package and version names in the sources.","needs_analyst":true,"not_affected_if":["no-doc-parsing","no-untrusted-input"],"who_is_affected":"Systems that parse untrusted Microsoft Word .doc files with wv or wvWare, such as document converters, previewers or word processors built on it. The sources describe only a crash, not code execution. Teams that never process untrusted .doc uploads with this library can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000639,"input_tokens":3364,"output_tokens":605,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112056':17A,20A '-2026':16A,19A '1.2.9':77C 'abiword':21B,73B,132C 'allow':94C 'app':7A 'applic':68B,98C,129C 'array':127C 'attack':95C,104C 'base':63B,82C,121C 'bound':13A,41B,86C 'contain':78C 'convers':24B 'craft':3A,50B,101C 'crash':6A,69B,97C,128C 'cve':15A,18A 'demonstr':71B 'doc':51B,108C 'document':23B 'document-convers':22B 'fewer':56B,113C 'file':5A,52B,109C 'heap':9A,37B,81C,126C 'heap-bas':80C 'host':28B 'index':64B,122C 'librari':34B 'make':65B 'out-of-bound':10A,38B,83C 'out-of-rang':59B,116C 'packag':25B 'pars':46B 'past':125C 'provid':106C 'rang':62B,119C 'read':14A,42B,67B,87C,124C 'self':27B 'self-host':26B 'style':57B,114C,120C 'stylesheet':48B,103C 'stylesheet.c':92C 'suppli':100C 'ten':54B,111C 'via':8A 'vulner':88C 'word':4A,47B,102C 'wv':2A,29B,33B,75C 'wvgetstsh':44B,90C 'wvware':1A,30B,31B,74C","nicknames":[],"mitigations":[],"who_affected":"Systems that parse untrusted Microsoft Word .doc files with wv or wvWare, such as document converters, previewers or word processors built on it. The sources describe only a crash, not code execution. Teams that never process untrusted .doc uploads with this library can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-18T13:16:37+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-112056","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112056","severity":null,"published_at":"2026-10-18T13:16:37+00:00","modified_at":"2026-10-19T21:14:14+00:00","first_seen_at":"2026-10-23T21:57:15+00:00","fetched_at":"2026-10-23T22:28:55+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"}