CVE-2026-49459: cure53 dompurify Cross-site Scripting
CVSS: 6.1v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-49459DEBIAN-CVE-2026-49459CGA-36jr-r887-63ffCGA-3wm9-3448-7xgqCGA-469j-wmpj-3fm6CGA-5vw5-2vm5-5j57CGA-9cf3-vw5p-f34vCGA-m4rf-82x5-rrv4CGA-q3ww-26hv-9x7fCGA-wgvw-g3r9-pggqCGA-xvm5-v3qh-gfr8GHSA-r47g-fvhr-h676CGA-224q-3g99-g46mCGA-26jv-4pw5-cw5vCGA-2879-6g6h-rwxrCGA-2m8w-54jx-628cCGA-3pqw-mhm4-vh7qCGA-3v8r-chpj-hfw8CGA-42c8-369v-6674CGA-4hjf-8m2q-rx43CGA-4rpg-q45r-fv5fCGA-5582-7c59-j5rrCGA-5g9m-6gfp-4xjrCGA-5h35-p55x-97x5CGA-5pc4-2hf4-wgpcCGA-5pfc-vg53-65h8CGA-64r3-9qr7-mf8jCGA-6cpx-x4xx-q3rhCGA-6cx6-g2v6-3f9xCGA-6fmq-wqhw-9c6qCGA-6ggj-32xh-cq33CGA-7562-hh7q-x7gxCGA-7757-8c7q-mv9fCGA-7f3h-c5w9-r274CGA-7jxr-85h2-6rqjCGA-8396-f66r-4xf4CGA-83f6-6q7r-9rhxCGA-84xq-hjc8-w8ghCGA-87q3-32m4-5cjjCGA-892q-x234-xcmvCGA-8g68-q9jh-rxrpCGA-8qmg-23jc-q998CGA-8r32-gmjc-hg72CGA-92q8-2mc6-3mghCGA-968v-2782-qg3mCGA-98mv-77f5-gcw5CGA-9fj5-wc44-79m3CGA-9ghf-3rq8-m332CGA-9vgv-m9g9-gvr6CGA-c833-9x3c-5hw2CGA-cp68-rw7x-9rm6CGA-cxx3-8c45-mhr4CGA-f6m2-p7vv-9h5gCGA-f847-c9gp-6hppCGA-f9w3-7c2m-fwx6CGA-ff77-w5wx-vq78CGA-fq5m-2ccv-v65hCGA-frg6-gx99-3ff4CGA-g25m-f85c-w4rmCGA-g37w-qr8h-jwgfCGA-g66f-gg2j-8xxvCGA-g6xm-64fr-5wc3CGA-g7j4-7hxq-j2mqCGA-gjxw-hqjh-w44qCGA-gx66-mf3q-hrjrCGA-h57c-cj6p-83q9CGA-h94j-8vqg-6fgvCGA-hf69-gg78-9fh4CGA-hjrf-rwfv-m9hpCGA-hq56-c26j-hfpwCGA-hrff-g59f-5q2pCGA-jg6f-9pr5-hc5cCGA-jv2h-q72h-p4p5CGA-jwhj-pprr-c2h9CGA-jwrx-jq3x-vqxcCGA-mjg3-4c4h-rpq2CGA-mm8j-mwgx-59hcCGA-mxcv-7gcj-x7pqCGA-p4p4-h65w-9x34CGA-p9mr-cj92-qx5jCGA-pc26-25v9-8f6hCGA-ph34-fg65-vg87CGA-pjw9-q8vv-f2qwCGA-pmfv-pwvq-jr2rCGA-pqgq-8mmw-8wwcCGA-q463-5wpq-fwprCGA-q478-cc4v-8873CGA-q47f-xfh6-264rCGA-q6w4-xpjp-jvx6CGA-qm6p-g2q7-p3j7CGA-qvh7-4pjw-mghfCGA-r5rg-gh48-vq85CGA-r9fr-r5jq-prmrCGA-r9jp-f798-pqc8CGA-rcj4-7q6g-2wr5CGA-rfqw-w2mv-g2c8CGA-rmrf-w5m7-2jc2CGA-rq8v-46hq-7xwgCGA-rqx7-r3xm-q9mrCGA-rwrg-mm3f-w8pjCGA-rxwh-xvjm-4f4rCGA-v52m-jxmg-jxf2CGA-v63p-vhrw-4pc5CGA-vmfc-m8vv-g899CGA-vqqw-h6f5-pfr4CGA-w2jr-65qp-rc7mCGA-w8mm-2hjc-w3xqCGA-w949-m85q-97p9CGA-w9vv-rx5j-rj4fCGA-wwqp-mmrq-929pCGA-x6qw-6g2v-jhm7CGA-xh5v-693c-4xjmCGA-xpq7-29pp-gc94CGA-xxvh-g4w8-gvh8
Published 14-07-2026Last modified 15-07-2026
Vulnerability summary
CVE-2026-49459 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in cure53 dompurify. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)EPSS score
0.36%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 14-07-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
Description
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.
CVSS metrics
7 scores · 7 sources · 1 versionMedium 6.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NSourcesAll 7 agree
- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · WolfiEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · NpmEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · ChainguardEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- NVDNIST6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
0.36%
Chance of exploitation in the next 30 days
Percentile
29%
Versus all other CVEs
30-day change
0.00 pp
From 0.36% on 20-09-2026
20-09-202620-10-2026
EPSS score0.36%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundDompurify
Maturity: poc
Weaknesses
CWE · root cause- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
- CWE-693Protection Mechanism FailureThe product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
- CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
Affected systems
Chainguard50 products
- airflow-2All versions (No fix recorded)
- airflow-core-2All versions (No fix recorded)
- gitlab-rails-ce-18.1All versions (No fix recorded)
- gitlab-rails-ce-18.10All versions (No fix recorded)
- gitlab-rails-ce-18.11All versions (No fix recorded)
Wolfi4 products
- langfuse-3-compat< 3.225.7-r6
- langfuse-3-worker< 3.188.0-r0
- nextcloud-server-32< 32.0.12-r0
- nextcloud-server-33< 33.0.6-r0
Ubuntu2 products
- dompurify.jsAll versions (No fix recorded)
- node-dompurifyAll versions (No fix recorded)
Cure531 product
- dompurify< 3.4.6
Debian1 product
- node-dompurifyAll versions (No fix recorded) | < 3.4.12+dfsg-1
Npm1 product
- dompurify< 3.4.6
6 vendors · 59 products
References
9 links- github.com/cure53/DOMPurify/security/advisories/GHSA-r47g-fvhr-h676X Refsource CONFIRMREPORTAdvisoryWEBExploitMitigationVendor Advisory
- github.com/cure53/DOMPurify/commit/bb7739e5bccec7e1ab3dae3f3e42d02db3acaaaeX Refsource MISCREPORTFIXPatch
- github.com/cure53/DOMPurifyPACKAGE