CVE-2026-6019

MEDIUMNVD 6.16.1—

6.1

http.cookies.Morsel.js_output() returns an inline snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.

CVSS v3: 6.1
EG Score: 6.1(high)
EPSS: 9.3%
KEV: Not listed

Published

April 22, 2026

Last Modified

May 18, 2026

References (6)

Vendor Advisories for CVE-2026-6019(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

GHSA-2755-2mm4-rm5c
GitHub Security AdvisoriesLow
http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for...

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-21 22:43 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 16:06 UTCEG score recompute
2026-05-20 16:06 UTCGHSA enrichment
2026-05-20 11:22 UTCepss_batch

Frequently asked(5)

What is CVE-2026-6019?

CVE-2026-6019 is a medium vulnerability published on April 22, 2026. http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie…

When was CVE-2026-6019 disclosed?

CVE-2026-6019 was first published in the National Vulnerability Database on April 22, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-6019 actively exploited?

CVE-2026-6019 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-6019?

CVE-2026-6019 has a CVSS v3 base score of 6.1 (NVD).

How do I remediate CVE-2026-6019?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6019, 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-2026-6019

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CVE-2026-6019

📅 Published

🔄 Last Modified

🔗 References (6)

📣 Vendor Advisories for CVE-2026-6019(1)