CVE-2026-62642: roundcube webmail Infinite Loop
CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-62642DEBIAN-CVE-2026-62642
Published 14-07-2026Last modified 14-07-2026
Vulnerability summary
CVE-2026-62642 is a medium (CVSS 6.5) Infinite Loop vulnerability in roundcube webmail. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43.2% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
0.52%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3 · Related 1Timeline
- 14-07-2026PublishedVulnerability first disclosed.
- 14-07-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSources4 sources · 4.3–6.5
- CVE.orgCNA4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.52%
Chance of exploitation in the next 30 days
Percentile
43%
Versus all other CVEs
30-day change
0.00 pp
From 0.52% on 21-09-2026
21-09-202621-10-2026
EPSS score0.52%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- roundcube< 1.6.5+dfsg-1+deb12u10 | < 1.6.17+dfsg-0+deb13u1 | < 1.6.17+dfsg-1
Roundcube1 product
- webmail≥ 1.6.0, < 1.6.17 | ≥ 1.7.0, < 1.7.2
Ubuntu1 product
- roundcubeAll versions (No fix recorded)
3 vendors · 3 products
