CVE-2016-7966

high

Published 2016-12-23 · Modified 2026-05-06

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CVSS v3

7.3

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v4 NEW

—

not yet in upstream

VIR risk

7.3

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.

Predictions

Exploit likelihood

82%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

Fedora Affected 1 release

Version	Status	Fixed in
25	Affected	—

Debian Mixed 6 releases

Version	Status	Fixed in
trixie	Fixed	`5.26.0-3`
sid	Fixed	`5.26.0-3`
forky	Fixed	`5.26.0-3`
bullseye	Fixed	`5.26.0-3`
bookworm	Fixed	`5.26.0-3`
8.0	Affected	—

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`5.26.0-2`

Application impact

Vendor	Product	Versions	Fixed
kde	kmail	`{"endIncluding":"4.4.0"}`

References

CWEs

CWE-94

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.