CVE-2026-85062 Colord: Slow rejection of oversized malformed color strings
An attacker can cause a denial of service by supplying oversized malformed color strings to the colord library, blocking the processing thread.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-85062?
CVE-2026-85062 is a medium-severity denial of service vulnerability in omgovich colord, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Colord is a tiny yet powerful tool for high-performance color manipulations and conversions. Prior to 2.9.4, synchronous CSS color string matchers in src/colorModels/rgbString.ts, src/colorModels/hslString.ts, src/colorModels/hwbString.ts, src/colorModels/lchString.ts, and src/colorModels/cmykString.ts use the ambiguous numeric regular expression ([+-]?\d*.?\d+), allowing the same digits to be divided between overlapping quantifiers in quadratically many ways when malformed input is rejected. An attacker who can supply an unbounded color string to colord(), getFormat(), isEqual(), mix(), or contrast(), including through a request body, JSON field, or uploaded stylesheet, can block the processing thread with a multi-kilobyte payload. The affected matchers are parseRgbaString, parseHslaString, parseHwbaString, parseLchaString, and parseCmykaString. This issue is fixed in version 2.9.4.
Weakness: CWE-1333
Which versions are affected by CVE-2026-85062?
2 open source packages ship an affected version, including colord.
| Package | Affected | Fixed in |
|---|---|---|
colord npm | All versions | 2.9.4 |
colord npm | All versions | 2.9.4 |
How do I fix CVE-2026-85062?
Upgrade colord to 2.9.4 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-85062 being exploited?
There is no known exploitation of CVE-2026-85062 in the wild and no public exploit code.
Sources
Also known as AZL-99084, CLSA-2026-1790006394, GHSA-2wm5-q62r-hmrv, MINI-7m49-wmhq-g9fj, MINI-q23j-879p-gpv7, MINI-qgm8-fjx9-946f.