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CVE-2026-33019

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow leading to an out-of-bounds heap read in the --crop option handling of img2sixel, where positive coordinates up to INT_MAX are accepted without overflow-safe bounds checking. In sixel_encoder_do_clip(), the expression clip_w + clip_x overflows to a large negative value when clip_x is INT_MAX, causing the bounds guard to be skipped entirely, and the unclamped coordin
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2e4c4aacaa4a7689ca1b6f68b6af072e72708ed2898251c22b4088457cbd72da
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"libsixel","vendor":"saitoha","versions":[{"status":"affected","version":"< 1.8.7-r1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1","tags":["x_refsource_MISC"],"url":"https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/saitoha/libsixel/security/advisories/GHSA-c854-ffg9-g72c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /containers/adp/0/references/0
{"name":"https://github.com/saitoha/libsixel/security/advisories/GHSA-c854-ffg9-g72c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/saitoha/libsixel/security/advisories/GHSA-c854-ffg9-g72c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50ec62d346dd0743395fbad19b7989d8cb935aef7ad354530a74164504b5130d · sha256:f55788f925d7366a… · /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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