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CVE-2026-32739

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This iss
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7c05a721bb210555b4acc7d30734f1be505dc162aee2195d37a7bd88eaadbce3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"libheif","vendor":"strukturag","versions":[{"status":"affected","version":"< 1.22.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:56556ccd49700610313e8c682dfb334a342b864f573afcbbe1642c1b3eb728fa · sha256:9c6b521fee59c530… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:56556ccd49700610313e8c682dfb334a342b864f573afcbbe1642c1b3eb728fa · sha256:9c6b521fee59c530… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-835","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:56556ccd49700610313e8c682dfb334a342b864f573afcbbe1642c1b3eb728fa · sha256:9c6b521fee59c530… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/strukturag/libheif/releases/tag/v1.22.0","tags":["x_refsource_MISC"],"url":"https://github.com/strukturag/libheif/releases/tag/v1.22.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:56556ccd49700610313e8c682dfb334a342b864f573afcbbe1642c1b3eb728fa · sha256:9c6b521fee59c530… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:56556ccd49700610313e8c682dfb334a342b864f573afcbbe1642c1b3eb728fa · sha256:9c6b521fee59c530… · /containers/adp/0/references/0
{"name":"https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:56556ccd49700610313e8c682dfb334a342b864f573afcbbe1642c1b3eb728fa · sha256:9c6b521fee59c530… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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