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CVE-2026-85062— Colord: Slow rejection of oversized malformed color strings

Quick assessment

Affected
omgovich colord
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vlad Shilov Colord是Vlad Shilov个人开发者的一款处理颜色的前端库。 Vlad Shilov Colord 2.9.4之前版本存在资源管理错误漏洞，该漏洞源于CSS颜色字符串匹配器使用了有歧义的数值正则表达式，可能导致攻击者通过提供无界颜色字符串阻塞处理线程，造成拒绝服务。

CVSS 6.9 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1295

Affected Version Matrix 1

VendorProduct Version RangeStatus
omgovich colord < 2.9.4 affected
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I. Basic Information for CVE-2026-85062

Vulnerability Information
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Vulnerability Title
Colord: Slow rejection of oversized malformed color strings
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Vlad Shilov Colord 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vlad Shilov Colord是Vlad Shilov个人开发者的一款处理颜色的前端库。 Vlad Shilov Colord 2.9.4之前版本存在资源管理错误漏洞，该漏洞源于CSS颜色字符串匹配器使用了有歧义的数值正则表达式，可能导致攻击者通过提供无界颜色字符串阻塞处理线程，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
omgovich colord < 2.9.4 -

II. Public POCs for CVE-2026-85062

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III. Intelligence Information for CVE-2026-85062

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Patches & Fixes for CVE-2026-85062 (2)

Vendor Advisories for CVE-2026-85062 (1)

IV. Related Vulnerabilities

Same product: colord
Same weakness: CWE-1333

V. Comments for CVE-2026-85062

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