CVE-2026-110596
quirc through 1.2 Denial of Service via find_alignment_pattern Spiral Search
dlbeer quirc
CVSS
6.8MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
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.
Text from CVE List
Affected versions 1
- quircaffected: all versions through 1.2CVE List
References 5
- github.com/dlbeer/quirc/pull/159Fixvia CVE List
- hackmd.io/@haind-pwn/quirc-alignment-pattern-infinite-loop-dosAdvisoryvia CVE List
- vulncheck.com/advisories/quirc-through-1.2-denial-of-service-via-find-alignment-pattern-spiral-searchAdvisoryvia CVE List
- github.com/dlbeer/quirc/issues/162Referencevia CVE List
- github.com/dlbeer/quirc/blob/542848dd6b9b0eaa9587bbf25b9bc67bd8a71fca/lib/identify.c#L578-L636Referencevia CVE List