{"id":"CVE-2026-123199","kind":"vulnerability","aliases":["CVE-2026-123199"],"related":[],"title":"eBook-speaker: stack overflow from long attribute in EPUB or DAISY books","description":"eBook-speaker 6.1.0 through 6.2.0 contains a stack buffer overflow vulnerability in get_attributes() in src/common.c caused by an unbounded strcpy of an element's name attribute. Attackers can craft an EPUB or DAISY book with a name attribute of 511 or more characters to corrupt the stack and crash the reader when opened.","summary":"eBook-speaker 6.1.0 through 6.2.0 copies an element's name attribute into a fixed stack buffer with an unbounded strcpy in get_attributes(). A crafted EPUB or DAISY book with a name of 511 or more characters corrupts the stack and crashes the reader when opened.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["daisy","ebook-speaker","epub","linux","other"],"not_affected_if":["untrusted-books-not-opened","version-outside-6.1.0-6.2.0"],"how_to_check":"- Check the installed eBook-speaker version against the affected range `6.1.0` through `6.2.0`\n- Look for eBook-speaker in the installed software list on the machine","fix":"- Patch exists per the linked fix reference; the fixed version is unknown from the sources","status":"open","published_at":"2026-11-05T19:17:18+00:00","first_seen_at":"2026-11-05T19:40:35+00:00","triaged_at":"2026-11-05T19:43:17+00:00","updated_at":"2026-11-05T19:43:17+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-05T19:43:17Z","model":"claude-haiku-5-5","output":{"fix":"- Patch exists per the linked fix reference; the fixed version is unknown from the sources","reach":"local","title":"eBook-speaker: stack overflow from long attribute in EPUB or DAISY books","impact":"low","summary":"eBook-speaker 6.1.0 through 6.2.0 copies an element's name attribute into a fixed stack buffer with an unbounded strcpy in get_attributes(). A crafted EPUB or DAISY book with a name of 511 or more characters corrupts the stack and crashes the reader when opened.","audience":"everyone","category":"other","nicknames":[],"who_cares":["ebook-speaker","epub","daisy","linux"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Reader crashes; stack corruption may allow more","analyst_note":"Confirm the fixed version and whether the stack overflow allows code execution, using the linked patch and the vulncheck advisory.","how_to_check":"- Check the installed eBook-speaker version against the affected range `6.1.0` through `6.2.0`\n- Look for eBook-speaker in the installed software list on the machine","plain_action":"If you use eBook-speaker, check your version and update it once a fixed release is available from its maintainer.","needs_analyst":true,"not_affected_if":["untrusted-books-not-opened","version-outside-6.1.0-6.2.0"],"who_is_affected":"Anyone who opens a crafted EPUB or DAISY book in an affected eBook-speaker version (6.1.0 through 6.2.0) is exposed. The sources describe a crash on open; they do not say whether code execution is possible. Systems that never open untrusted books with this reader can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000743,"input_tokens":4296,"output_tokens":627,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-123199':16A,19A '-2026':15A,18A '511':60B,114C '6.1.0':29B,76C '6.2.0':31B,78C 'attack':101C 'attribut':8A,37B,49B,87C,100C,112C 'book':13A,55B,108C 'buffer':42B,82C 'caus':90C 'charact':63B,117C 'contain':79C 'copi':32B 'corrupt':64B,119C 'craft':51B,103C 'crash':68B,123C 'cve':14A,17A 'daisi':12A,20B,54B,107C 'ebook':2A,22B,27B,74C 'ebook-speak':1A,21B,26B,73C 'element':34B,97C 'epub':10A,24B,52B,105C 'fix':40B 'get':48B,86C 'linux':25B 'long':7A 'name':36B,58B,99C,111C 'open':72B,127C 'overflow':5A,83C 'reader':70B,125C 'speaker':3A,23B,28B,75C 'src/common.c':89C 'stack':4A,41B,66B,81C,121C 'strcpi':46B,94C 'unbound':45B,93C 'vulner':84C","nicknames":[],"mitigations":[],"who_affected":"Anyone who opens a crafted EPUB or DAISY book in an affected eBook-speaker version (6.1.0 through 6.2.0) is exposed. The sources describe a crash on open; they do not say whether code execution is possible. Systems that never open untrusted books with this reader can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"If you use eBook-speaker, check your version and update it once a fixed release is available from its maintainer.","pkeys":[],"ptokens":[],"labels":["daisy","ebookspeaker","epub","linux","medium","other"],"campaign_type":null,"first_public_at":"2026-11-05T19:17:18+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-2026-123199","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123199","severity":null,"published_at":"2026-11-05T19:17:18+00:00","modified_at":"2026-11-05T19:17:18+00:00","first_seen_at":"2026-11-05T19:40:35+00:00","fetched_at":"2026-11-05T19:40:35+00:00","note":null}],"documents":[{"id":79190,"url":"https://github.com/book-readers/ebook-speaker/commit/23b5c86585d7e3c27c932b112f4e36858e70f210","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":79191,"url":"https://www.vulncheck.com/advisories/ebook-speaker-through-6.2.0-stack-based-buffer-overflow-via-element-name-attribute","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}