Description
Through a malicious URL that contained a quote character it was possible to inject HTML code in KMail's plaintext viewer. Due to the parser used on the URL it was not possible to include the equal sign (=) or a space into the injected HTML, which greatly reduces the available HTML functionality. Although it is possible to include an HTML comment indicator to hide content.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | kcoreaddons | 5.26.0-3 | — |
| Debian 13 | kcoreaddons | 5.26.0-3 | — |
| Debian 12 | kcoreaddons | 5.26.0-3 | — |
| Debian 8 | kdepimlibs | 4:4.14.2-2+deb8u2 | DSA-3697-1 |
| Debian 7 | kdepimlibs | 4:4.8.4-2+deb7u1 | DLA-673-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | kcoreaddons | 5.18.0-0ubuntu1.1 | — |
| Ubuntu 14.04 LTS | kdepimlibs | 4:4.13.3-0ubuntu0.4 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 SP1 | kcoreaddons | 5.20.0-6.1 | openSUSE-SU-2016:2559-1, openSUSE-SU-2016:2558-1 |
Advisories 4
- DSA-3697-1 kdepimlibs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-673-1 kdepimlibs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2016:2558-1 Security update for kcoreaddons SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2016:2559-1 Security update for kcoreaddons SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 93360 vdb-entry
- [oss-security] 20161004 Re: KMail vulnerabilites: need 3 CVE mailing-list
- FEDORA-2016-92c112a380 vendor-advisory
- openSUSE-SU-2016:2559 vendor-advisory
- DSA-3697 vendor-advisory