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Fencer Vulns
medium 4.3

CVE-2026-62642 json

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, an infinite loop was discovered in the TNEF decoder, which may lead to denial of…

published 2026-07-14 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-43747

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, an infinite loop was discovered in the TNEF decoder, which may lead to denial of service upon opening an email with a TNEF attachment.

Patch / fix

  • Roundcube Webmail 1.6.17, 1.7.2
  • roundcube Debian 12 1.6.5+dfsg-1+deb12u10
  • roundcube Debian 13 1.6.17+dfsg-0+deb13u1
  • roundcube Debian 14 1.6.17+dfsg-1

debian advisories DEBIAN-CVE-2026-62642

  • roundcubemail openSUSE Leap 16.0 1.6.20-bp160.1.1
  • roundcubemail openSUSE Tumbleweed 1.6.19-1.1

opensuse advisories openSUSE-SU-2026:22195-1openSUSE-SU-2026:12169-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-62642 updated cvss 4.3

roundcubemail: Roundcube Webmail: Denial of Service via infinite loop in TNEF decoder

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Roundcube Webmail

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.