{"id":"CVE-2023-26359","kind":"vulnerability","aliases":["CVE-2023-26359"],"related":[],"title":"Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a…","description":"Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.","summary":"Adobe ColdFusion has a deserialization flaw that handles untrusted data unsafely. An attacker can run code in the context of the ColdFusion server process.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2023-08-21T00:00:00+00:00","products":[{"name":"Adobe ColdFusion","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"adobe coldfusion","fixed":[],"affected":"= 2018","ecosystem":"vendor"},{"name":"adobe coldfusion","fixed":[],"affected":"= 2021","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["coldfusion","exploited","runtime","self-hosted"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the mitigations or patches from Adobe's advisory for ColdFusion; if none are available, stop using the product (per CISA). Specific versions are unknown from these sources.","status":"open","published_at":"2023-03-23T20:15:15+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:04:47+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T21:04:47Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations or patches from Adobe's advisory for ColdFusion; if none are available, stop using the product (per CISA). Specific versions are unknown from these sources.","reach":"unknown","impact":"high","summary":"Adobe ColdFusion has a deserialization flaw that handles untrusted data unsafely. An attacker can run code in the context of the ColdFusion server process.","category":"runtime","who_cares":["coldfusion","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs code on the ColdFusion server as its service user.","analyst_note":"Exploited in the wild per CISA KEV; find affected version ranges, patched builds and the Adobe security bulletin for CVE-2023-26359.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000452,"input_tokens":2813,"output_tokens":342,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':18A,21A '-26359':19A,22A '15':6A,64C '2018':4A,62C '2021':10A,68C '5':12A,70C 'adob':1A,35B,59C 'adobe':23A,25A,27A 'affect':16A,74C 'arbitrari':86C 'attack':47B 'code':50B,87C 'coldfus':2A,29B,36B,56B,60C 'coldfusion':24A,26A,28A 'context':53B,91C 'could':83C 'current':94C 'cve':17A,20A 'data':44B,80C 'deseri':39B,77C 'earlier':8A,14A,66C,72C 'execut':88C 'exploit':30B,96C 'flaw':40B 'handl':42B 'host':34B 'interact':104C 'issu':99C 'process':58B 'requir':102C 'result':84C 'run':49B 'runtim':31B 'self':33B 'self-host':32B 'server':57B 'unsaf':45B 'untrust':43B,79C 'updat':5A,11A,63C,69C 'user':95C,103C 'version':3A,61C 'vulner':81C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-03-23T20:15:15+00:00","kev":{"dateAdded":"2023-08-21","dueDate":"2023-09-11","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"psirt@adobe.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-26359","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-26359","severity":null,"published_at":"2023-08-21T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T20:35:34+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-26359","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26359","severity":null,"published_at":"2023-03-23T20:15:15+00:00","modified_at":"2026-06-17T05:43:10+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}