CVE-2026-45109: vercel next.js
CVSS: 7.5v3.1HighModified
AliasesCGA-vq4p-gr8h-j293GHSA-26hh-7cqf-hhc6CGA-7hv9-j3qx-jqrwCGA-c7fx-2vxj-55jrCGA-fhh5-8whx-ggx8CGA-fx8g-pfpp-x4c9CGA-qqj5-4j3j-g3jm
Published 13-05-2026Last modified 13-08-2026
Vulnerability summary
CVE-2026-45109 is a high (CVSS 7.5) vulnerability in vercel next.js. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.7% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.76%
0%100%
Low · +0.19 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 13-05-2026PublishedVulnerability first disclosed.
- 13-08-2026Last modifiedVulnerability information updated.
Description
Next.js is a React framework for building full-stack web applications. From 15.2.0 to before 15.5.18 and 16.2.6, it was found that the fix addressing CVE-2026-44575 did not apply to middleware.ts with Turbopack. This vulnerability is fixed in 15.5.18 and 16.2.6.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesAll 5 agree
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · NpmEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.76%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
+0.19 pp
From 0.57% on 21-09-2026
21-09-202621-10-2026
EPSS score0.76%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-288Authentication Bypass Using an Alternate Path or ChannelThe product requires authentication, but the product has an alternate path or channel that does not require authentication.
- CWE-358Improperly Implemented Security Check for StandardThe product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.
Affected systems
Chainguard4 products
- commercial-chainloop-frontendAll versions (No fix recorded)
- jitsucom-jitsu-console< 2.11.0-r24
- keep-ui< 0.51.0-r7
- langfuse-fips-3.152All versions (No fix recorded)
Npm1 product
- next≥ 15.2.0, < 15.5.18 | ≥ 16.0.0, < 16.2.6
Vercel1 product
- next.js≥ 15.2.0, < 15.5.17 | ≥ 15.2.0, < 15.5.18 | ≥ 16.0.0, < 16.2.6
Wolfi1 product
- jitsucom-jitsu-console< 2.11.0-r24
4 vendors · 7 products
References
14 links- github.com/vercel/next.js/security/advisories/GHSA-26hh-7cqf-hhc6X Refsource CONFIRMAdvisoryWEBVendor Advisory
