# CVE-2026-59888: jackson-databind: @JsonIgnore on a Record property is bypassed with a PropertyNamingStrategy > Attackers can bypass @JsonIgnore annotations on Java Record properties when using PropertyNamingStrategy, potentially exposing sensitive data. - **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 14 Jul 2026 - **Updated:** 14 Jul 2026 - **Also known as:** CLEANSTART-2026-EW05090, CLEANSTART-2026-GQ65848, CLEANSTART-2026-OI38839, CLEANSTART-2026-OJ07374, CLEANSTART-2026-OU70021, CLEANSTART-2026-QO27706, CLEANSTART-2026-RI59147, CLEANSTART-2026-SG81759, CLEANSTART-2026-ZJ02711, ECHO-0460-b582-014c, GHSA-3pjw-73gf-8qr5, MINI-23jj-c777-pv67, MINI-2h3h-rg39-f68h, MINI-2h4x-vhjf-wh95, MINI-2m5h-wmwh-v82q, MINI-2mr7-w6fj-vpj8, MINI-2q46-rww7-qr6f, MINI-2qr8-cqg7-f84c, MINI-2w9g-28vj-78fh, MINI-2xrc-x2v2-frfg, MINI-2xv6-548p-frgv, MINI-34gh-rcgr-6cfj, MINI-39j8-xp9j-6q45, MINI-3cch-ghp8-253v, MINI-4cph-pc8j-v8qp, MINI-4m39-wv73-qrj6, MINI-4vcf-g72j-r4wg, MINI-4w23-mjw7-hm2g, MINI-53rc-8vvh-p9xv, MINI-55wq-7g35-3vqx, MINI-5639-r58q-9c76, MINI-5h7v-fmhp-j3vh, MINI-692r-2x96-vf6g, MINI-69g5-59jg-2pff, MINI-6jmr-vrqv-239c, MINI-6vh5-c763-3gj9, MINI-6vj3-8p2r-356f, MINI-6vwg-87pq-3jxj, MINI-7584-g9gx-p3r4, MINI-75vg-ggmp-r9r3, MINI-7vvf-56w5-5534, MINI-858w-p6jg-7c74, MINI-89c4-7mhq-f9mh, MINI-8cr8-6fxq-c2jw, MINI-8h62-6q2v-w283, MINI-8pq7-g5hq-3mjh, MINI-8qrr-qg94-v57g, MINI-8wc9-hmv3-g9j6, MINI-955j-qxrc-x99c, MINI-959r-7v84-6p46, MINI-9879-ww73-86fm, MINI-98w4-588g-5r6f, MINI-9m53-gh3q-4x89, MINI-9p8x-6m6g-45m9, MINI-9r4h-532x-968w, MINI-9x5h-hfhc-f9gr, MINI-c9rx-h63v-62r9, MINI-cc4v-g7jq-89j6, MINI-cjx7-cvxv-q85h, MINI-cqcg-5886-355g, MINI-cr2v-3xf5-9xh6, MINI-f3w9-59v6-r5cm, MINI-frh2-fwr7-r48x, MINI-frxj-jc5v-65xf, MINI-fv36-6wjr-wqq2, MINI-fwch-q9c9-hjmj, MINI-fwcp-jj5p-vmj4, MINI-fxq9-4jw4-773h, MINI-g553-x4g3-jjgp, MINI-gg28-jp83-3hh3, MINI-h263-w6j9-7x77, MINI-h33m-f8cf-63pg, MINI-h433-x5xf-p482, MINI-h47h-49j8-m59h, MINI-hcpf-q6x8-65jf, MINI-hq23-q8cr-r29j, MINI-hvx3-7c45-5m29, MINI-j3gp-qcrq-j2xr, MINI-jc35-wc63-872r, MINI-m7wm-wj2h-r4hm, MINI-m823-q4c3-7h34, MINI-m89v-9495-4x2q, MINI-mc23-8pg6-722h, MINI-mh6j-h8mx-cvfm, MINI-mmfv-5j7r-8gwm, MINI-mp55-q32v-hm6m, MINI-mpwj-4v6x-gm37, MINI-mqwr-rq63-rm2h, MINI-mw7x-9ww6-j9fj, MINI-mwg4-92h6-6wwh, MINI-p282-66cw-63hv, MINI-pcq3-h432-f2rf, MINI-pgx9-278g-qq57, MINI-pj4p-wxrc-wgv7, MINI-pr6h-94pj-vgph, MINI-px7j-vcwf-63w5, MINI-q255-j792-g3xc, MINI-q383-8w86-428v, MINI-qj3c-jp3h-qrw3, MINI-qjpq-fqxp-x43w, MINI-qjr2-jcr5-hvx2, MINI-qpjh-f8qr-m8h9, MINI-qq3v-fwcc-xf2q, MINI-r22j-cvf7-f336, MINI-r553-xvvh-4f44, MINI-r5c6-5jmh-29j7, MINI-rg52-fppp-77jp, MINI-rg9q-33fg-8mhq, MINI-rmw6-g84w-6fvm, MINI-v2vq-8qx7-w8fj, MINI-v38j-f953-qf3p, MINI-vcgj-6w5r-h8fv, MINI-vh2c-qwvq-vfrr, MINI-vq96-rgrq-xhc7, MINI-vwqq-m4r7-vvvq, MINI-vx4g-g4fw-5wfr, MINI-w662-r24q-93hx, MINI-w6jq-gq4g-9796, MINI-w6r3-jcxc-jjvj, MINI-w7gq-qwfv-g3fq, MINI-wrcq-6vrv-xprf, MINI-ww63-v9fr-mp89, MINI-wwqq-ww2r-wr86, MINI-wx63-gm7r-qrw6, MINI-x3pg-m4wj-qmq9, MINI-x44w-wwm3-96x2, MINI-x8r9-c742-98vc, MINI-x94g-m55p-vxh9, MINI-xf9r-5grv-xchm, MINI-xhf5-3x95-h8mm, MINI-xhpc-rjf5-cr7f, ROOT-APP-MAVEN-CVE-2026-59888, UBUNTU-CVE-2026-59888 ## What is CVE-2026-59888? CVE-2026-59888 is a medium-severity vulnerability in FasterXML jackson-databind, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, 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 2.15.0 until 2.18.8, 2.21.4, and 3.1.4, Java Records using a PropertyNamingStrategy can bypass @JsonIgnore because POJOPropertiesCollector._removeUnwantedIgnorals() records an ignored component under its original implicit name before _renameUsing() applies the naming strategy, allowing the renamed JSON key to be assigned to the Record constructor parameter. This issue is fixed in versions 2.18.8, 2.21.4, and 3.1.4. Weakness: CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes) ## Which versions are affected by CVE-2026-59888? 6 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 2.15.0 | 2.18.8 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.15.0 | 2.18.8 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.19.0 | 2.21.4 | | `com.fasterxml.jackson.core:jackson-databind` | Maven | From 2.19.0 | 2.21.4 | | `tools.jackson.core:jackson-databind` | Maven | From 3.0.0 | 3.1.4 | | `tools.jackson.core:jackson-databind` | Maven | From 3.0.0 | 3.1.4 | ## How do I fix CVE-2026-59888? Upgrade com.fasterxml.jackson.core:jackson-databind to a fixed version for your release line: 2.18.8 or 2.21.4. ## Is CVE-2026-59888 being exploited? There is no known exploitation of CVE-2026-59888 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-59888 and fix it if it is affected. What it is: CVE-2026-59888 is a medium-severity vulnerability in FasterXML jackson-databind, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2026-59888 in the wild and no public exploit code. Affected packages and fixed versions: - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.15.0; fixed in 2.18.8 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.15.0; fixed in 2.18.8 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.19.0; fixed in 2.21.4 - com.fasterxml.jackson.core:jackson-databind (Maven): affected from 2.19.0; fixed in 2.21.4 - tools.jackson.core:jackson-databind (Maven): affected from 3.0.0; fixed in 3.1.4 - tools.jackson.core:jackson-databind (Maven): affected from 3.0.0; fixed in 3.1.4 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-2026-59888/ (Markdown: https://insights.sbomify.com/CVE-2026-59888/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-59888 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59888 - OSV: https://osv.dev/vulnerability/CVE-2026-59888 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-59888/ Summaries are generated and may contain mistakes; the official description above is the record.