{"id":"CVE-2026-123273","kind":"vulnerability","aliases":["CVE-2026-123273"],"related":[],"title":"ImageMagick: crafted SVG file makes image decoding hang forever","description":"ImageMagick before 7.1.2-35 and 6.9.13-60 contains an infinite loop vulnerability in the SVG decoder because QueueAuthenticPixelCacheNexus in MagickCore/cache.c fails to validate requested region width and height. Attackers can supply a crafted SVG image that repeatedly requests a non-advancing pixel region, consuming CPU and hanging the decoding worker.","summary":"ImageMagick's SVG decoder fails to validate the width and height of a requested pixel region, so a crafted SVG can keep it looping. An attacker who gets a malicious SVG processed consumes CPU and hangs the decoding worker, which is a denial of service.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["image-processing","imagemagick","package","self-hosted","svg"],"not_affected_if":["no-svg-input","patched-version"],"how_to_check":"- Run `magick -version` or `convert -version` and compare against the fixed versions.\n- Check whether SVG input from untrusted users is passed to ImageMagick, for example in upload or thumbnail pipelines.","fix":"- ImageMagick 7 branch: `7.1.2-35`\n- ImageMagick 6 branch: `6.9.13-60`","status":"open","published_at":"2026-11-05T19:17:20+00:00","first_seen_at":"2026-11-05T19:40:37+00:00","triaged_at":"2026-11-05T19:43:05+00:00","updated_at":"2026-11-05T19:43:05+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-05T19:43:05Z","model":"claude-haiku-5-5","output":{"fix":"- ImageMagick 7 branch: `7.1.2-35`\n- ImageMagick 6 branch: `6.9.13-60`","reach":"internet","title":"ImageMagick: crafted SVG file makes image decoding hang forever","impact":"low","summary":"ImageMagick's SVG decoder fails to validate the width and height of a requested pixel region, so a crafted SVG can keep it looping. An attacker who gets a malicious SVG processed consumes CPU and hangs the decoding worker, which is a denial of service.","audience":"businesses","category":"package","nicknames":[],"who_cares":["imagemagick","svg","image-processing","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Decoding worker hangs and consumes CPU until restarted","analyst_note":"","how_to_check":"- Run `magick -version` or `convert -version` and compare against the fixed versions.\n- Check whether SVG input from untrusted users is passed to ImageMagick, for example in upload or thumbnail pipelines.","plain_action":"","needs_analyst":false,"not_affected_if":["no-svg-input","patched-version"],"who_is_affected":"Systems that run ImageMagick below the fixed versions and decode SVG files, especially those that accept uploads or generate thumbnails from user-supplied images. Installations that never process SVG input, or that run only trusted content, are less exposed. The sources do not describe a default-configuration exposure.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000713,"input_tokens":4368,"output_tokens":553,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-123273':12A,15A '-2026':11A,14A '-35':73C '-60':76C '6.9.13':75C '7.1.2':72C 'advanc':111C 'attack':50B,98C 'consum':57B,114C 'contain':77C 'cpu':58B,115C 'craft':2A,43B,102C 'cve':10A,13A 'decod':7A,28B,62B,85C,119C 'denial':67B 'fail':29B,90C 'file':4A 'forev':9A 'get':52B 'hang':8A,60B,117C 'height':35B,97C 'host':23B 'imag':6A,17B,104C 'image-process':16B 'imagemagick':1A,19B,25B,70C 'infinit':79C 'keep':46B 'loop':48B,80C 'magickcore/cache.c':89C 'make':5A 'malici':54B 'non':110C 'non-advanc':109C 'packag':20B 'pixel':39B,112C 'process':18B,56B 'queueauthenticpixelcachenexus':87C 'region':40B,94C,113C 'repeat':106C 'request':38B,93C,107C 'self':22B 'self-host':21B 'servic':69B 'suppli':100C 'svg':3A,24B,27B,44B,55B,84C,103C 'valid':31B,92C 'vulner':81C 'width':33B,95C 'worker':63B,120C","nicknames":[],"mitigations":[],"who_affected":"Systems that run ImageMagick below the fixed versions and decode SVG files, especially those that accept uploads or generate thumbnails from user-supplied images. Installations that never process SVG input, or that run only trusted content, are less exposed. The sources do not describe a default-configuration exposure.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","imagemagick","imageprocessing","package","selfhosted","svg"],"campaign_type":null,"first_public_at":"2026-11-01T09:35:46+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/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-2026-123273","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123273","severity":null,"published_at":"2026-11-05T19:17:20+00:00","modified_at":"2026-11-05T19:17:21+00:00","first_seen_at":"2026-11-05T19:40:37+00:00","fetched_at":"2026-11-05T19:40:37+00:00","note":null}],"documents":[{"id":79223,"url":"https://github.com/ImageMagick/ImageMagick/commit/c5f2c6c9fb1458f960a506691c9351e9da6d2247","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":79224,"url":"https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-35","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":79225,"url":"https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-q66g-3m63-78mh","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-11-01T09:35:46+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":79226,"url":"https://github.com/ImageMagick/ImageMagick6/commit/712e523e7f746d35c963b78555e1c24364a9426e","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":79227,"url":"https://github.com/ImageMagick/ImageMagick6/releases/tag/6.9.13-60","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":79228,"url":"https://www.vulncheck.com/advisories/imagemagick-before-7.1.2-35-and-6.9.13-60-infinite-loop-via-svg-decoder","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"}