6.1

CVE-2026-44580: vercel next.js Cross-site Scripting

CVSS: 6.1v3.1MediumAnalyzed
AliasesGHSA-gx5p-jg67-6x7hCGA-3p6x-f56v-mx28CGA-875w-jfxw-mwjx
Published 13-05-2026Last modified 13-05-2026
Open JSON

Vulnerability summary

CVE-2026-44580 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in vercel next.js. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.8% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.25%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-H76M-2Q9M-82H7

Timeline

  1. 13-05-2026
    PublishedVulnerability first disclosed.
  2. 13-05-2026
    Last modifiedVulnerability information updated.

Description

Next.js is a React framework for building full-stack web applications. From 13.0.0 to before 15.5.16 and 16.2.5, applications that use beforeInteractive scripts together with untrusted content can be vulnerable to cross-site scripting. In affected versions, serialized script content was not escaped safely before being embedded into the document, which could allow attacker-controlled input to break out of the intended script context and execute arbitrary JavaScript in a visitor's browser. This vulnerability is fixed in 15.5.16 and 16.2.5.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

+0.05 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard4 products
  • cadence-webAll versions (No fix recorded)
  • commercial-chainloop-frontendAll versions (No fix recorded)
  • keep-ui< 0.51.0-r7
  • langfuse-fips-3.152All versions (No fix recorded)
Npm1 product
  • next≥ 13.0.0, < 15.5.16 | ≥ 16.0.0, < 16.2.5
Vercel1 product
  • next.js≥ 13.0.0, < 15.5.16 | ≥ 16.0.0, < 16.2.5

3 vendors · 6 products

References

6 links