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CVE-2026-48846

In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which may lead to information disclosure or access-control bypass.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b98f0a7c3a88444fa4de65f153ddc3bc3eba1c6b118d39f54457e59eddf24440
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Webmail","vendor":"Roundcube","versions":[{"lessThan":"1.6.16","status":"affected","version":"1.6.0","versionType":"semver"},{"lessThan":"1.7.1","status":"affected","version":"1.7.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-669","description":"CWE-669 Incorrect Resource Transfer Between Spheres","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"url":"https://github.com/roundcube/roundcubemail/commit/59cca80908a61e662c5f81741449e9aeb91e8abe"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/references/2
{"url":"https://github.com/roundcube/roundcubemail/commit/852350486b88b35b8544e8a630fad89e99e2150a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/references/4
{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.16"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/references/3
{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/references/1
{"url":"https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b5b27ef8c521833a1e968b6dfaa8053da73c861263efbdc4c46ccfc3ff73c2e · sha256:3cc97b85577070c5… · /containers/cna/references/0

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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