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CVE-2026-110596— quirc through 1.2 Denial of Service via find_alignment_pattern Spiral Search

Quick assessment

Affected
dlbeer quirc
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.

quirc 1.2 及之前版本中存在一个过度迭代漏洞，位于 lib/identify.c 文件的 find_alignment_pattern() 函数中，攻击者可以通过构造恶意图像导致 quirc_end() 挂起。攻击者可以排列三个定位图案（finder patterns），以产生一个近似退化的透视变换，从而引发 region_code() 函数进行数十亿次迭代，使解码攻击者提供的 QR 码图像的应用程序耗尽 CPU 资源。

CVSS 5.5 · Medium EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
dlbeer quirc ≤ 1.2 affected
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I. Basic Information for CVE-2026-110596

Vulnerability Information
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Vulnerability Title
quirc through 1.2 Denial of Service via find_alignment_pattern Spiral Search
Source: CVE Program / CVE List V5
Vulnerability Description
quirc through 1.2 contains an excessive-iteration vulnerability in find_alignment_pattern() in lib/identify.c that allows attackers to hang quirc_end() with a crafted image. Attackers can arrange three finder patterns producing a near-degenerate perspective transform, causing billions of region_code() iterations that exhaust CPU in applications decoding attacker-supplied QR images.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
过度迭代
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
dlbeer quirc 0 ~ 1.2 -

II. Public POCs for CVE-2026-110596

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III. Intelligence Information for CVE-2026-110596

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Patches & Fixes for CVE-2026-110596 (1)

Other References for CVE-2026-110596 (3)

IV. Related Vulnerabilities

Same weakness: CWE-834

V. Comments for CVE-2026-110596

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