# CVE-2026-59889: jackson-databind: @JsonView ypassed for @JsonUnwrapped container properties on deserialization > Attackers can bypass @JsonView restrictions to modify data via @JsonUnwrapped properties during deserialization in jackson-databind. - **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 14 Jul 2026 - **Updated:** 19 Oct 2026 - **Also known as:** CLEANSTART-2026-AC21815, CLEANSTART-2026-AD03048, CLEANSTART-2026-DR49804, CLEANSTART-2026-HK23784, CLEANSTART-2026-ND24866, CLEANSTART-2026-NN37649, CLEANSTART-2026-PM55694, CLEANSTART-2026-RZ02157, CLEANSTART-2026-VJ63292, ECHO-9969-7585-06b3, GHSA-5gvw-p9qm-jgwh, MINI-28jj-m576-2625, MINI-298j-rv88-pvw5, MINI-29qg-cfv8-j235, MINI-2jf3-j67f-gf3g, MINI-2vjq-8r28-3jpx, MINI-32wg-7gwx-6727, MINI-34ff-4xr2-wgx6, MINI-3mg2-fvq8-5hhp, MINI-3mmr-8v8f-c6hj, MINI-4fg7-f5jh-3cg7, MINI-4hpr-4mvg-q622, MINI-4hq8-c7vw-mv4m, MINI-52wc-vw3v-68vh, MINI-53jx-jvh4-6p86, MINI-5cpv-v4mw-r9wc, MINI-5wqq-c7ww-8m8q, MINI-6744-fh2m-qg2c, MINI-78c6-495w-r2c2, MINI-798v-58qc-2qfg, MINI-7fj6-mvpg-x529, MINI-7jqj-7rj5-f32j, MINI-7qh8-f24f-qph9, MINI-7qw8-23qg-923v, MINI-7rhp-f9qv-cmq6, MINI-82jx-74wc-89r7, MINI-84q2-vfh8-3522, MINI-85q2-3fj2-78jp, MINI-898w-ww38-mfhf, MINI-8c89-w24f-p9mf, MINI-9jp8-4f2h-pfxh, MINI-9mrc-33vg-6572, MINI-9xqg-6xjw-v5mm, MINI-c4p8-cchw-33vm, MINI-c629-3xjj-hm7c, MINI-c972-25rx-9x6p, MINI-cccj-8r9q-fc8p, MINI-cqv7-pcfj-wjq9, MINI-cwrx-x55v-7hv8, MINI-f2r8-6qqv-mv8r, MINI-f82w-g96x-72x8, MINI-fm2w-vrq9-vfxv, MINI-g225-w55c-28fm, MINI-g3rj-jpr5-r6fg, MINI-gw9f-crq4-528j, MINI-h3pc-fqm3-m7qf, MINI-h7c7-7fxq-2wmr, MINI-h8jw-mv7x-fm5h, MINI-hpp2-qc86-hg2c, MINI-hvqg-xgpq-cv32, MINI-j374-7jm6-qf44, MINI-j5c9-65w7-f8c8, MINI-jxjg-4vf6-3f6p, MINI-m53g-v49c-p48v, MINI-m6p5-fjm8-qfjx, MINI-m6v6-f9pj-prfq, MINI-m84f-9q96-6298, MINI-mgw5-783r-h88x, MINI-mh39-c5hq-267q, MINI-mrvf-m5jg-c7mq, MINI-p898-h5v8-598p, MINI-pjv6-w9p8-jmf6, MINI-q28g-c3hc-wx94, MINI-q95f-g9cp-w69c, MINI-qw8p-vj64-hmwx, MINI-qw9r-6cjf-fg38, MINI-rh55-26hv-rxpx, MINI-rpxv-w3pm-694v, MINI-rxfx-864r-65mj, MINI-v3m3-4qvg-j8w9, MINI-v5x6-5jww-3vgf, MINI-v9wh-8g3g-8237, MINI-vf33-f46m-j3fj, MINI-w5wx-q87f-2646, MINI-wf3j-26r6-6wcf, MINI-wg6c-w9rj-268w, MINI-wg7j-64q9-fvf8, MINI-wjc3-w7wf-j8hc, MINI-xg26-rjvc-x3gc, MINI-xq6f-vf6r-wf8p, MINI-xr6q-p32v-c4xj, MINI-xrgg-q8q3-9mrq, ROOT-APP-MAVEN-CVE-2026-59889, UBUNTU-CVE-2026-59889 ## What is CVE-2026-59889? CVE-2026-59889 is a medium-severity vulnerability in FasterXML jackson-databind, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim. ### Official description jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.18.0 until 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1, UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON for a @JsonUnwrapped property and calls prop.deserializeAndSet() without a prop.visibleInView(ctxt.getActiveView()) guard, allowing a property annotated with both @JsonView and @JsonUnwrapped to be written from attacker JSON under a less-privileged active view. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1. Weakness: CWE-863 (Incorrect Authorization) ## Which versions are affected by CVE-2026-59889? 10 open source packages ship an affected version, including com.fasterxml.jackson.core:jackson-databind and tools.jackson.core:jackson-databind. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.0.0-RC1 | 2.18.9 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.0.0-RC1 | 2.18.9 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.19.0 | 2.21.5 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.19.0 | 2.21.5 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.22.0 | 2.22.1 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.22.0 | 2.22.1 | | `tools.jackson.core:jackson-databind` | Maven | From 3.0.0 | 3.1.5 | | `tools.jackson.core:jackson-databind` | Maven | From 3.0.0 | 3.1.5 | | `tools.jackson.core:jackson-databind` | Maven | From 3.2.0 | 3.2.1 | | `tools.jackson.core:jackson-databind` | Maven | From 3.2.0 | 3.2.1 | ## How do I fix CVE-2026-59889? Upgrade com.fasterxml.jackson.core:jackson-databind to a fixed version for your release line: 2.18.9, 2.21.5 or 2.22.1. ## Is CVE-2026-59889 being exploited? There is no known exploitation of CVE-2026-59889 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-59889 and fix it if it is affected. What it is: CVE-2026-59889 is a medium-severity vulnerability in FasterXML jackson-databind, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2026-59889 in the wild and no public exploit code. Affected packages and fixed versions: - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.0.0-RC1; fixed in 2.18.9 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.0.0-RC1; fixed in 2.18.9 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.19.0; fixed in 2.21.5 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.19.0; fixed in 2.21.5 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.22.0; fixed in 2.22.1 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.22.0; fixed in 2.22.1 - tools.jackson.core:jackson-databind (Maven): affected from 3.0.0; fixed in 3.1.5 - tools.jackson.core:jackson-databind (Maven): affected from 3.0.0; fixed in 3.1.5 - tools.jackson.core:jackson-databind (Maven): affected from 3.2.0; fixed in 3.2.1 - tools.jackson.core:jackson-databind (Maven): affected from 3.2.0; fixed in 3.2.1 Task: 1. 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. 2. 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. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-59889/ (Markdown: https://insights.sbomify.com/CVE-2026-59889/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-59889 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59889 - OSV: https://osv.dev/vulnerability/CVE-2026-59889 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-59889/ Summaries are generated and may contain mistakes; the official description above is the record.