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CVE-2026-61876

LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN containing script tags that execute in the administrator's browser when viewing DHCP lease pages.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:45a2032dc48349eb7ab969aba1de8563d5f0de1a9263c65f9ce31d5f2932da58
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":9.4,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"luci","vendor":"openwrt"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":9.4,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-686p-p8p9-x6fh)","tags":["vendor-advisory"],"url":"https://github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/references/0
{"name":"VulnCheck Advisory: LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/luci-dhcpv6-lease-hostname-stored-cross-site-scripting"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c8f5e29dfad1b3ac0e840045ae1c1d1c875d01a55cbeb11b25600cd2ef9b9894 · sha256:a32abf1c128037c7… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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