Symfony UX is a JavaScript ecosystem for Symfony. From 2.2.0 until 2.36.0 and 3.1.0, the Stimulus controller in symfony/ux-autocomplete renders AJAX response items in _createAutocompleteWithRemoteData() by interpolating the text field into HTML template literals (${item[labelField]}) rather than text, allowing attacker-controlled markup from user-supplied dropdown values to execute in the browser of any user who opens an autocomplete widget backed by the same data. This issue is fixed in versions 2.36.0 and 3.1.0.
CVE-2026-49216
MEDIUMNVD 5.45.4—Trending — 4 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.4
- EG Score
- 5.4(medium)
- EG Risk
- 24(Track)EG Risk 24/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity54% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 7.6%
- KEV
- Not listed
Published
June 19, 2026
Last Modified
July 21, 2026
Advisory Details (4)
Auto-updated Jul 17, 2026Patch available. Sources: github_release, github, github_commit.
github Patch Available
XSS in symfony/ux-autocomplete via unescaped AJAX response data · Advisory · symfony/ux · GitHub
https://github.com/symfony/ux/security/advisories/GHSA-mwqm-4fw3-cjvrgithub_release Patch Available
v3.1.0
Patch available: symfony/ux v3.1.0
https://github.com/symfony/ux/releases/tag/v3.1.0github_release Patch Available
v2.36.0
Patch available: symfony/ux v2.36.0
https://github.com/symfony/ux/releases/tag/v2.36.0github_commit Patch Available
commit 842ae54bc74d (symfony/ux)
Patch available: symfony/ux v2.36.0 (contains commit 842ae54bc74d)
https://github.com/symfony/ux/commit/842ae54bc74de389299f975f01aafae272cb0019Vendor Advisories for CVE-2026-49216(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| symfony/ux-autocomplete | v3.0.0 | 3.1.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 11× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:18 UTCEG score recompute▲ 0.30
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:25 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-20 17:06 UTCNVD updateCVSS v3 → 5.4
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-17 16:20 UTCEG score recompute▲ 5.10
- 2026-07-17 16:19 UTCMITRE cvelistV5CVSS v3 → 5.1 · CVSS v4 → 5.1
- 2026-06-19 19:36 UTCEG score recompute
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-49216?
CVE-2026-49216 is a medium vulnerability published on June 19, 2026. Symfony UX is a JavaScript ecosystem for Symfony. From 2.2.0 until 2.36.0 and 3.1.0, the Stimulus controller in symfony/ux-autocomplete renders AJAX response items in _createAutocompleteWithRemoteData() by interpolating the text field into HTML template literals (<div>${item[labelField]}</div>)…
When was CVE-2026-49216 disclosed?
CVE-2026-49216 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49216 actively exploited?
CVE-2026-49216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49216?
CVE-2026-49216 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-49216?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49216, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49216
Is Your Infrastructure Affected by CVE-2026-49216?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.