CVE-2026-6322: fast-uri · Interpretation Conflict
Affects fast-uriSource GCVE Database
Not known to be exploited · CVSS 7.5 High · fixed in 3.1.2 : patch fast-uri soon.
Data as of 12 Nov 2026, 00:38 UTC
Sources agree
| CNA (openjs) | CVSS 3.1 | 7.5 |
|---|---|---|
| ADP (redhat-SADP) | CVSS 3.1 | 7.5 |
- Patch
- Available – fixed in 3.1.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 5 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| fast-uri fast-uri | Affected
| Fixed in– |
AI-suggested
Update fast-uri to version 3.1.2 or later where this vulnerability is fixed. Applications should ensure they use the patched version to prevent bypass of host allowlist checks and related security controls. No additional mitigation is required if the update is applied.
Description
CVE-2026-6322 is a vulnerability in the fast-uri library versions up to 3.1.1 where percent-encoded authority delimiters in URIs are improperly decoded and re-emitted. This causes the URI's authority component to be interpreted incorrectly, allowing attackers to bypass host allowlist checks, redirect validation, or outbound request routing by steering applications to a different domain than intended. The issue is fixed in version 3.1.2 and later.
References
- github.com/fastify/fast-uri/security/advisories/GHSA-v39h-62p7-jpjc (opens in a new tab)
- cna.openjsf.org/security-advisories.html (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-6322 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2466684 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6322.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:42078 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:34160 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:34342 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:37385 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25273 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:34374 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:42142 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41951 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36754 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26234 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29197 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:61783 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:36651 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:40945 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:40118 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60855 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41928 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:43038 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:60520 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:57487 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:54555 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:34766 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:37628 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29800 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:34770 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:37186 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29834 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29796 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29795 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56431 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56366 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:57013 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56968 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:56928 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:33683 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:30076 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41066 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:54395 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:28571 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26225 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:25271 (opens in a new tab)