{"id":"CVE-2026-87367","kind":"vulnerability","aliases":["CVE-2026-87367"],"related":[],"title":"Java SE: JAXP flaw lets remote attacker alter some data","description":"Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JAXP).  Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and  21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition.  Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 3.7 (Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).","summary":"A flaw in the JAXP XML component of Oracle Java SE and GraalVM lets an unauthenticated network attacker make limited unauthorized changes to data the application exposes. The attack is hard to carry out and works through web services that pass data into the affected APIs.","severity":"low","cvss":3.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["graalvm","java","jaxp","runtime","web-services"],"not_affected_if":["no-untrusted-xml","patched-jdk"],"how_to_check":"- Run `java -version` and compare the build with the affected releases: 8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1.\n- Check whether GraalVM for JDK 17.0.20.1 or 21.0.12.1, or GraalVM Enterprise 21.3.19.1.1, is in use.\n- Look for services that parse untrusted XML through JAXP APIs.","fix":"- Update Oracle Java SE to the patched release for your line (the Oracle July 2026 Critical Patch Update release for that line).\n- Update Oracle GraalVM for JDK or GraalVM Enterprise to the patched build for your line.\n- Rebuild and redeploy applications that bundle their own JDK.","status":"open","published_at":"2026-10-20T22:20:14+00:00","first_seen_at":"2026-10-23T21:57:25+00:00","triaged_at":"2026-10-25T04:43:51+00:00","updated_at":"2026-10-25T04:43:51+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-25T04:43:51Z","model":"claude-haiku-5-5","output":{"fix":"- Update Oracle Java SE to the patched release for your line (the Oracle July 2026 Critical Patch Update release for that line).\n- Update Oracle GraalVM for JDK or GraalVM Enterprise to the patched build for your line.\n- Rebuild and redeploy applications that bundle their own JDK.","reach":"internet","title":"Java SE: JAXP flaw lets remote attacker alter some data","impact":"low","summary":"A flaw in the JAXP XML component of Oracle Java SE and GraalVM lets an unauthenticated network attacker make limited unauthorized changes to data the application exposes. The attack is hard to carry out and works through web services that pass data into the affected APIs.","category":"runtime","nicknames":[],"who_cares":["java","jaxp","web-services","graalvm"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker can change or delete some data the application exposes.","analyst_note":"Check the Oracle Critical Patch Update advisory for the exact patched build numbers and any exposure details for JAXP.","how_to_check":"- Run `java -version` and compare the build with the affected releases: 8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1.\n- Check whether GraalVM for JDK 17.0.20.1 or 21.0.12.1, or GraalVM Enterprise 21.3.19.1.1, is in use.\n- Look for services that parse untrusted XML through JAXP APIs.","needs_analyst":true,"not_affected_if":["patched-jdk","no-untrusted-xml"],"who_is_affected":"Systems running the listed Oracle Java SE or GraalVM builds that expose JAXP XML processing to untrusted input, such as web services that accept XML from the network. Java applets and Java Web Start clients that run untrusted code are also named in the advisory. Teams that run only patched builds or never parse untrusted XML through JAXP can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000742,"input_tokens":3802,"output_tokens":723,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-87367':13A,16A '/av':253C '11.0.32.1':104C '17.0.20.1':105C,113C '21.0.12.1':106C,115C '21.3.19.1.1':120C '25.0.4.1':107C '27':108C '3.1':243C,252C '3.7':246C '8u503':100C,102C '8u503-perf':101C 'access':130C,160C,175C 'affect':68B,95C 'allow':125C 'also':203C 'alter':8A 'api':69B,185C,200C 'applet':220C 'appli':204C 'applic':49B,216C 'attack':7A,41B,52B,127C,148C 'base':244C 'carri':56B 'chang':45B 'client':210C 'code':226C,228C 'come':230C 'compon':30B,89C,189C 'compromis':135C 'cve':11A,14A 'cvss':242C,249C,251C 'data':10A,47B,65B,176C,197C 'delet':159C 'deploy':207C 'difficult':121C 'e.g':190C,227C 'edit':83C,119C,146C,174C 'enterpris':82C,118C,145C,173C 'exploit':123C,182C 'expos':50B 'flaw':4A,25B 'graalvm':17B,36B,77C,81C,110C,117C,140C,144C,168C,172C 'h/pr':255C 'hard':54B 'impact':248C 'insert':157C 'integr':247C 'internet':233C 'java':1A,18B,33B,74C,87C,98C,137C,165C,206C,213C,219C,238C 'jaxp':3A,19B,28B,90C 'jdk':79C,112C,142C,170C 'l/a':260C 'let':5A,37B 'limit':43B 'load':222C 'make':42B 'multipl':132C 'n':261C 'n/ac':254C 'n/i':259C 'n/s':257C 'n/ui':256C 'network':40B,129C 'note':177C 'oracl':32B,73C,76C,80C,86C,97C,109C,116C,136C,139C,143C,164C,167C,171C 'pass':64B 'perf':103C 'product':84C 'protocol':133C 'reli':235C 'remot':6A 'result':153C 'run':211C,224C 'runtim':20B 'sandbox':212C,218C,239C 'score':245C 'se':2A,34B,75C,88C,99C,138C,166C 'secur':241C 'servic':23B,62B,194C 'specifi':188C 'start':215C 'success':147C 'suppli':196C 'support':91C 'typic':208C 'u/c':258C 'unauthent':39B,126C 'unauthor':44B,155C 'untrust':225C 'updat':156C 'use':184C 'vector':250C 'version':92C 'via':131C 'vulner':70C,124C,151C,179C,202C 'web':22B,61B,193C,214C 'web-servic':21B 'work':59B 'xml':29B","nicknames":[],"mitigations":[],"who_affected":"Systems running the listed Oracle Java SE or GraalVM builds that expose JAXP XML processing to untrusted input, such as web services that accept XML from the network. Java applets and Java Web Start clients that run untrusted code are also named in the advisory. Teams that run only patched builds or never parse untrusted XML through JAXP can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:20:14+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-87367","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87367","severity":null,"published_at":"2026-10-20T22:20:14+00:00","modified_at":"2026-10-21T18:44:19+00:00","first_seen_at":"2026-10-23T21:57:25+00:00","fetched_at":"2026-10-23T22:29:00+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"}