CVE Explorer

CVE-2026-23951

SumatraPDF is a multi-format reader for Windows. All versions contain an off-by-one error in the validation code that only triggers with exactly 2 records, causing an integer underflow in the size calculation. This bug exists in PalmDbReader::GetRecord when opening a crafted Mobi file, resulting in an out-of-bounds heap read that crashes the app. There are no published fixes at the time of publication.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8000e701ad5e7da0827d3d481cde9ae96461703d019e87cb867accaa5bda4afd

Known exploited

Not asserted

Disputed

Stale source

Conflicts

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:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"sumatrapdf","vendor":"sumatrapdfreader","versions":[{"status":"affected","version":"<= 3.5.2rel"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/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:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /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:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/sumatrapdfreader/sumatrapdf/blob/master/src/PalmDbReader.cpp","tags":["x_refsource_MISC"],"url":"https://github.com/sumatrapdfreader/sumatrapdf/blob/master/src/PalmDbReader.cpp"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /containers/cna/references/1

{"name":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-hj4w-c5x8-p2hv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-hj4w-c5x8-p2hv"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57f7f766d44692dd4c8055c6a858b9b313bee78a01cce98b1175493d3c447060 · sha256:e83d3ce21c3f5764… · /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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