nuxt-api-party is an open source module to proxy API requests. nuxt-api-party attempts to check if the user has passed an absolute URL to prevent the aforementioned attack. This has been recently changed to use the regular expression ^https?://, however this regular expression can be bypassed by an absolute URL with leading whitespace. For example \nhttps://whatever.com which has a leading newline. According to the fetch specification, before a fetch is made the URL is normalized. "To normalize a byte sequence potentialValue, remove any leading and trailing HTTP whitespace bytes from potentialValue.". This means the final request will be normalized to https://whatever.com bypassing the check and nuxt-api-party will send a request outside of the whitelist. This could allow us to leak credentials or perform Server-Side Request Forgery (SSRF). This vulnerability has been addressed in version 0.22.1. Users are advised to upgrade. Users unable to upgrade should revert to the previous method of detecting absolute URLs.
CVE-2023-49799
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.4%, top 19% 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).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EPSS
- 52.9%
- KEV
- Not listed
Published
December 9, 2023
Last Modified
June 17, 2026
References (10)
- security-advisories@githubhttps://fetch.spec.whatwg.org/
- security-advisories@githubhttps://fetch.spec.whatwg.org/#http-whitespace-byte
- security-advisories@githubhttps://github.com/johannschopplich/nuxt-api-party/blob/777462e1e3af1d9f8938aa33f230cd8cb6e0cc9a/src/runtime/server/handler.ts#L31
- security-advisories@githubhttps://github.com/johannschopplich/nuxt-api-party/security/advisories/GHSA-3wfp-253j-5jxv
- security-advisories@githubhttps://infra.spec.whatwg.org/#byte-sequence
- af854a3a-2127-422b-91ae-364da2661108https://fetch.spec.whatwg.org/
- af854a3a-2127-422b-91ae-364da2661108https://fetch.spec.whatwg.org/#http-whitespace-byte
- af854a3a-2127-422b-91ae-364da2661108https://github.com/johannschopplich/nuxt-api-party/blob/777462e1e3af1d9f8938aa33f230cd8cb6e0cc9a/src/runtime/server/handler.ts#L31
- af854a3a-2127-422b-91ae-364da2661108https://github.com/johannschopplich/nuxt-api-party/security/advisories/GHSA-3wfp-253j-5jxv
- af854a3a-2127-422b-91ae-364da2661108https://infra.spec.whatwg.org/#byte-sequence
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nuxt-api-party | — | 0.22.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 46× 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.
- 2026-07-12 05:45 UTCEPSS rescore
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- 2026-05-26 07:18 UTCEPSS rescore
- 2026-05-24 12:30 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-918
Frequently asked(5)
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