{"answers":{"affected":"10 open source packages ship an affected version, including com.fasterxml.jackson.core:jackson-core and tools.jackson.core:jackson-core.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89407 exists.","fix":"Upgrade com.fasterxml.jackson.core:jackson-core to a fixed version for your release line: 2.18.11, 2.21.7 or 2.22.3.","what":"CVE-2026-89407 is a high-severity denial of service vulnerability in FasterXML jackson-core, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-89407 and fix it if it is affected.\n\nWhat it is: CVE-2026-89407 is a high-severity denial of service vulnerability in FasterXML jackson-core, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89407 exists.\n\nAffected packages and fixed versions:\n- com.fasterxml.jackson.core:jackson-core (Maven): affected from 2.17.0; fixed in 2.18.11\n- com.fasterxml.jackson.core:jackson-core (Maven): affected from 2.17.0; fixed in 2.18.11\n- com.fasterxml.jackson.core:jackson-core (Maven): affected from 2.19.0; fixed in 2.21.7\n- com.fasterxml.jackson.core:jackson-core (Maven): affected from 2.19.0; fixed in 2.21.7\n- com.fasterxml.jackson.core:jackson-core (Maven): affected from 2.22.0; fixed in 2.22.3\n- com.fasterxml.jackson.core:jackson-core (Maven): affected from 2.22.0; fixed in 2.22.3\n- tools.jackson.core:jackson-core (Maven): affected from 3.0.0; fixed in 3.1.7\n- tools.jackson.core:jackson-core (Maven): affected from 3.0.0; fixed in 3.1.7\n- tools.jackson.core:jackson-core (Maven): affected from 3.2.0; fixed in 3.2.2\n- tools.jackson.core:jackson-core (Maven): affected from 3.2.0; fixed in 3.2.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-89407/ (Markdown: https://insights.sbomify.com/CVE-2026-89407/index.md)","id":"CVE-2026-89407","markdown":"https://insights.sbomify.com/CVE-2026-89407/index.md","name":"CVE-2026-89407","record":{"aliases":["CLEANSTART-2026-BF54172","CLEANSTART-2026-CS86865","CLEANSTART-2026-DR85611","CLEANSTART-2026-JK65929","CLEANSTART-2026-MS81723","CLEANSTART-2026-NA92074","CLEANSTART-2026-OZ91827","CLEANSTART-2026-PG40177","CLEANSTART-2026-PQ78486","CLEANSTART-2026-PW40505","CLEANSTART-2026-XB73842","CLEANSTART-2026-YZ58880","CLEANSTART-2026-ZC88513","CLSA-2026-1792428704","CLSA-2026-1792428825","CLSA-2026-1792428857","CLSA-2026-1793196375","DEBIAN-CVE-2026-89407","ECHO-2c66-582f-1a6e","GHSA-p6pp-m3f8-5c89","MINI-228p-9w73-w9w4","MINI-29xj-8m9r-qwrv","MINI-2hwm-hhxg-gp39","MINI-2p5m-6wp5-j28c","MINI-325w-2gp7-rg9x","MINI-343c-jf9r-58f5","MINI-37jc-8hx8-cmq9","MINI-3868-9r67-gcq7","MINI-38gf-3fvc-97h4","MINI-3gcr-m8pm-qhwx","MINI-3h4c-r935-g9rq","MINI-3mc9-2fg5-cpr7","MINI-3mg2-7q38-g797","MINI-3px4-8p95-g7h8","MINI-423h-vmxp-3hw2","MINI-468r-wqqm-3px7","MINI-48cw-jjcc-m33q","MINI-4x4h-hrw5-mf9p","MINI-5552-h7fr-3vgh","MINI-5fw8-v57r-4cgq","MINI-5h28-7hh7-ffjg","MINI-5xpp-w4c7-jh3v","MINI-638p-xx2q-phxg","MINI-63g3-3c94-j8c5","MINI-6g4v-fr3m-4q75","MINI-6gjg-xp8w-f4ww","MINI-6vcj-88f4-rgrp","MINI-73gg-rmmv-g7g3","MINI-7w2h-r9q6-9v6g","MINI-8h68-2hfc-9v69","MINI-8wq8-g45j-6jqc","MINI-8x5p-f8gr-vrp4","MINI-9ffj-gm75-84h2","MINI-9hr9-96q7-r6xw","MINI-ccc6-m4f6-5c52","MINI-f298-vw58-hgrr","MINI-f4m7-wr38-wfmw","MINI-fq7g-xv98-p7vv","MINI-fvwj-pr7r-mfpr","MINI-g866-wjp3-hr4q","MINI-gj9h-p89q-mj4h","MINI-gr2r-hgc5-f59f","MINI-h8p2-gfxf-vgxq","MINI-h94r-3rpq-w6xp","MINI-hf6f-46mm-q25w","MINI-hggv-79rm-vwhg","MINI-hr2f-xr8q-cx97","MINI-hrj3-63h4-cr83","MINI-hv88-2f89-889f","MINI-hx4h-r2x6-6875","MINI-j48g-pf52-pqjf","MINI-j497-4h43-h4m3","MINI-j8pp-g9wj-pw7p","MINI-j99j-pfp8-w23p","MINI-jf7j-vrr8-5w26","MINI-jgr9-594q-q86p","MINI-jhqq-v2mq-x2f6","MINI-jmcr-w4mj-chp3","MINI-jvrw-m75p-3p2w","MINI-m2fh-3vg3-w788","MINI-m5pc-8ghf-q3xf","MINI-mp2m-4g69-f6mh","MINI-p68m-fw2f-vvfx","MINI-pwr9-pp3f-5hfg","MINI-q352-chp7-h8f7","MINI-qf9r-j753-vj33","MINI-qh27-8g2f-fcgj","MINI-rvx5-mv4x-2w6j","MINI-vvcc-q95m-cfc6","MINI-w7h7-55hm-28j9","MINI-w893-qh58-wp87","MINI-x385-vcqx-6jg7","ROOT-APP-MAVEN-CVE-2026-89407","UBUNTU-CVE-2026-89407"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Java JSON library","requires_auth":"none","summary":"Attackers can cause denial of service in applications using jackson-core by sending crafted JSON that triggers quadratic backtracking in number validation.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"HeroDevs","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"NumberInput.looksLikeValidNumber() in FasterXML jackson-core pre-validates \"stringified numbers\" with two regular expressions: PATTERN_FLOAT ([+-]?[0-9]*[\\.]?[0-9]+([eE][+-]?[0-9]+)?), present since 2.17.0, and PATTERN_FLOAT_TRAILING_DOT, added in 2.17.2. PATTERN_FLOAT places adjacent quantifiers over the same character class -- an optional [0-9]* run, an optional dot, then a required [0-9]+ run -- so input that ultimately fails to match forces Java's backtracking engine to retry every possible split point of the digit run. \n\nMatching cost therefore grows with the square of the input length. \n\nAn attacker who can supply JSON that an application deserializes into a numeric target type reaches this method through jackson-databind's default String-to-number coercion (StdDeserializer and NumberDeserializers for BigDecimal, BigInteger, Double and Float). \n\nBecause StreamReadConstraints.maxStringLength defaults to 20,000,000 characters, no constraint bounds the input before it reaches the regex. \n\nTesting by the reporter confirmed O(n^2) growth across five consecutive input-size doublings, with a single 160,000-character string consuming roughly 74 seconds in one call; a small number of concurrent requests of ordinary body size can therefore exhaust a server's request-handling thread pool. \n\nThe affected method does not exist before 2.17.0, so 2.16.x and earlier releases are not affected. \n\nThe fix replaces both regular expressions with a hand-rolled single-pass scan.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"jackson-core: quadratic backtracking in NumberInput.PATTERN_FLOAT via looksLikeValidNumber() enables ReDoS","id":"CVE-2026-89407","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":10,"n_references":4,"next":{"headline":"Unvalidated ZWAVE_CMD_NODES_EXIST May Cause Deletion of End Nodes​","id":"CVE-2026-89409"},"packages":[{"ecosystem":"Maven","fixed":["2.18.11"],"introduced":["2.17.0"],"last_affected":[],"package":"com.fasterxml.jackson.core:jackson-core","purl":null,"source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["2.18.11"],"introduced":["2.17.0"],"last_affected":[],"package":"com.fasterxml.jackson.core:jackson-core","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core","source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["2.21.7"],"introduced":["2.19.0"],"last_affected":[],"package":"com.fasterxml.jackson.core:jackson-core","purl":null,"source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["2.21.7"],"introduced":["2.19.0"],"last_affected":[],"package":"com.fasterxml.jackson.core:jackson-core","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core","source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["2.22.3"],"introduced":["2.22.0"],"last_affected":[],"package":"com.fasterxml.jackson.core:jackson-core","purl":null,"source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["2.22.3"],"introduced":["2.22.0"],"last_affected":[],"package":"com.fasterxml.jackson.core:jackson-core","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core","source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["3.1.7"],"introduced":["3.0.0"],"last_affected":[],"package":"tools.jackson.core:jackson-core","purl":null,"source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["3.1.7"],"introduced":["3.0.0"],"last_affected":[],"package":"tools.jackson.core:jackson-core","purl":"pkg:maven/tools.jackson.core/jackson-core","source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["3.2.2"],"introduced":["3.2.0"],"last_affected":[],"package":"tools.jackson.core:jackson-core","purl":null,"source":"GHSA-p6pp-m3f8-5c89"},{"ecosystem":"Maven","fixed":["3.2.2"],"introduced":["3.2.0"],"last_affected":[],"package":"tools.jackson.core:jackson-core","purl":"pkg:maven/tools.jackson.core/jackson-core","source":"GHSA-p6pp-m3f8-5c89"}],"prev":{"headline":"Missing authorization in Modula Image Gallery – Photo Grid \u0026 Video Gallery","id":"CVE-2026-89406"},"products":["jackson-core"],"published":"2026-09-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-22","vendors":["FasterXML"]},"summary":"Attackers can cause denial of service in applications using jackson-core by sending crafted JSON that triggers quadratic backtracking in number validation.","url":"https://insights.sbomify.com/CVE-2026-89407/"}