High severity7.5NVD Advisory· Published May 4, 2026· Updated Jul 21, 2026
CVE-2026-6321
CVE-2026-6321
Description
fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URIs could collapse onto the same normalized path. Applications that normalize or compare attacker-controlled URLs to enforce path-based policy can be bypassed, with a path that appears confined under an allowed prefix normalizing to a different location. Versions <= 3.1.0 are affected. Update to 3.1.1 or later.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
63- osv-coords62 versionspkg:apk/chainguard/arangodb-3.12pkg:apk/chainguard/argo-workflows-ui-3.6pkg:apk/chainguard/argo-workflows-ui-3.7pkg:apk/chainguard/drupal-11.3pkg:apk/chainguard/keep-uipkg:apk/chainguard/keep-ui-fipspkg:apk/chainguard/kibana-8.17pkg:apk/chainguard/kibana-8.17-bitnamipkg:apk/chainguard/kibana-8.17-iamguardedpkg:apk/chainguard/kibana-8.19pkg:apk/chainguard/kibana-8.19-bitnamipkg:apk/chainguard/kibana-8.19-iamguardedpkg:apk/chainguard/kibana-9.0pkg:apk/chainguard/kibana-9.0-bitnamipkg:apk/chainguard/kibana-9.0-iamguardedpkg:apk/chainguard/kibana-9.1pkg:apk/chainguard/kibana-9.1-iamguardedpkg:apk/chainguard/kibana-9.2pkg:apk/chainguard/kibana-9.2-iamguardedpkg:apk/chainguard/kibana-9.3pkg:apk/chainguard/kibana-9.3-iamguardedpkg:apk/chainguard/kibana-9.4pkg:apk/chainguard/kibana-9.4-iamguardedpkg:apk/chainguard/langfuse-2pkg:apk/chainguard/langfuse-2-workerpkg:apk/chainguard/langfuse-3pkg:apk/chainguard/langfuse-3-workerpkg:apk/chainguard/langfuse-fips-2pkg:apk/chainguard/langfuse-fips-2-workerpkg:apk/chainguard/langfuse-fips-3pkg:apk/chainguard/langfuse-fips-3-workerpkg:apk/chainguard/opensearch-dashboards-2pkg:apk/chainguard/opensearch-dashboards-2-fipspkg:apk/chainguard/opensearch-dashboards-3pkg:apk/chainguard/opensearch-dashboards-3-dashboards-observabilitypkg:apk/chainguard/opensearch-dashboards-3-fipspkg:apk/chainguard/opensearch-dashboards-3-fips-dashboards-observabilitypkg:apk/chainguard/prismpkg:apk/chainguard/safpkg:apk/chainguard/servepkg:apk/chainguard/tileserver-glpkg:apk/chainguard/tileserver-gl-fipspkg:apk/chainguard/vitess-23pkg:apk/chainguard/wazuh-dashboardpkg:apk/chainguard/wazuh-dashboard-fipspkg:apk/wolfi/argo-workflows-ui-3.7pkg:apk/wolfi/langfuse-3pkg:apk/wolfi/langfuse-3-workerpkg:apk/wolfi/opensearch-dashboards-2pkg:apk/wolfi/opensearch-dashboards-3pkg:apk/wolfi/opensearch-dashboards-3-dashboards-observabilitypkg:apk/wolfi/prismpkg:apk/wolfi/safpkg:apk/wolfi/servepkg:apk/wolfi/tileserver-glpkg:apk/wolfi/vitess-23pkg:npm/fast-uripkg:rpm/opensuse/openQA&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/openQA&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/os-autoinst&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/python-pydata-sphinx-theme&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/python-pydata-sphinx-theme&distro=openSUSE%20Tumbleweed
< 3.12.7.2-r5+ 61 more
- (no CPE)range: < 3.12.7.2-r5
- (no CPE)range: < 3.6.19-r6
- (no CPE)range: < 3.7.14-r1
- (no CPE)range: < 11.3.13-r3
- (no CPE)range: < 0.51.0-r6
- (no CPE)range: < 0.51.0-r6
- (no CPE)range: < 8.17.10-r21
- (no CPE)range: < 8.17.10-r21
- (no CPE)range: < 8.17.10-r21
- (no CPE)range: < 8.19.15-r0
- (no CPE)range: < 8.19.15-r0
- (no CPE)range: < 8.19.15-r0
- (no CPE)range: < 9.0.8-r25
- (no CPE)range: < 9.0.8-r25
- (no CPE)range: < 9.0.8-r25
- (no CPE)range: < 9.1.10-r17
- (no CPE)range: < 9.1.10-r17
- (no CPE)range: < 9.2.8-r3
- (no CPE)range: < 9.2.8-r3
- (no CPE)range: < 9.3.4-r4
- (no CPE)range: < 9.3.4-r4
- (no CPE)range: < 9.4.2-r1
- (no CPE)range: < 9.4.2-r1
- (no CPE)range: < 2.95.12-r23
- (no CPE)range: < 2.95.12-r23
- (no CPE)range: < 3.174.1-r0
- (no CPE)range: < 3.174.1-r0
- (no CPE)range: < 2.95.12-r25
- (no CPE)range: < 2.95.12-r25
- (no CPE)range: < 3.174.1-r0
- (no CPE)range: < 3.174.1-r0
- (no CPE)range: < 2.19.5-r11
- (no CPE)range: < 2.19.5-r11
- (no CPE)range: < 3.6.0-r4
- (no CPE)range: < 3.6.0-r4
- (no CPE)range: < 3.6.0-r6
- (no CPE)range: < 3.6.0-r6
- (no CPE)range: < 5.15.10-r0
- (no CPE)range: < 1.5.3-r1
- (no CPE)range: < 14.2.6-r3
- (no CPE)range: < 5.6.0-r2
- (no CPE)range: < 5.6.0-r3
- (no CPE)range: < 23.0.4-r0
- (no CPE)range: < 4.14.4-r4
- (no CPE)range: < 4.14.4-r2
- (no CPE)range: < 3.7.14-r1
- (no CPE)range: < 3.174.1-r0
- (no CPE)range: < 3.174.1-r0
- (no CPE)range: < 2.19.5-r11
- (no CPE)range: < 3.6.0-r4
- (no CPE)range: < 3.6.0-r4
- (no CPE)range: < 5.15.10-r0
- (no CPE)range: < 1.5.3-r1
- (no CPE)range: < 14.2.6-r3
- (no CPE)range: < 5.6.0-r2
- (no CPE)range: < 23.0.4-r0
- (no CPE)range: < 3.1.1
- (no CPE)range: < 5.1783076943.6691832d-bp160.1.1
- (no CPE)range: < 5.1782995932.ffeb09be-1.1
- (no CPE)range: < 5.1783082953.c3cb41d-bp160.1.1
- (no CPE)range: < 0.16.1-bp160.2.1
- (no CPE)range: < 0.17.1-1.1
Patches
Vulnerability mechanics
References
26- cna.openjsf.org/security-advisories.htmlnvdVendor Advisory
- github.com/advisories/GHSA-q3j6-qgpj-74h6ghsaADVISORY
- github.com/fastify/fast-uri/security/advisories/GHSA-q3j6-qgpj-74h6nvdVendor Advisory
- access.redhat.com/errata/RHSA-2026:19238nvd
- access.redhat.com/errata/RHSA-2026:20338nvd
- access.redhat.com/errata/RHSA-2026:21338nvd
- access.redhat.com/errata/RHSA-2026:24473nvd
- access.redhat.com/errata/RHSA-2026:24766nvd
- access.redhat.com/errata/RHSA-2026:24866nvd
- access.redhat.com/errata/RHSA-2026:24977nvd
- access.redhat.com/errata/RHSA-2026:25089nvd
- access.redhat.com/errata/RHSA-2026:25123nvd
- access.redhat.com/errata/RHSA-2026:26214nvd
- access.redhat.com/errata/RHSA-2026:26234nvd
- access.redhat.com/errata/RHSA-2026:26416nvd
- access.redhat.com/errata/RHSA-2026:26420nvd
- access.redhat.com/errata/RHSA-2026:34342nvd
- access.redhat.com/errata/RHSA-2026:37385nvd
- access.redhat.com/errata/RHSA-2026:42078nvd
- access.redhat.com/errata/RHSA-2026:42079nvd
- access.redhat.com/security/cve/CVE-2026-6321nvd
- bugzilla.redhat.com/show_bug.cginvd
- github.com/fastify/fast-uri/releases/tag/v2.4.1ghsa
- github.com/fastify/fast-uri/releases/tag/v3.1.1ghsa
- nvd.nist.gov/vuln/detail/CVE-2026-6321ghsa
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6321.jsonnvd
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