OSV-2026-816

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Import Source
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/md4c/OSV-2026-816.yaml
JSON Data
https://api.osv.dev/v1/vulns/OSV-2026-816
Published
2026-05-27T00:05:00.416781Z
Modified
2026-05-27T14:23:35.023545Z
Summary
Heap-buffer-overflow in md_process_all_blocks
Details

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=516422428

Crash type: Heap-buffer-overflow READ {*}
Crash state:
md_process_all_blocks
md_parse
md_html
References

Affected packages

OSS-Fuzz / md4c

Package

Name
md4c
Purl
pkg:generic/md4c

Affected ranges

Type
GIT
Repo
https://github.com/mity/md4c
Events
Introduced
589681bc2e61bd23eccb2226a1752ad7466f81fd
Fixed
fb4d03dfda4e4e0c24f9a1b43ccd2dacab2bd190
Introduced
1010c1c53d3db2eae60b1db5afd168adb416b0c4

Ecosystem specific 

{
    "severity": "MEDIUM"
}

Database specific

fixed_range 
"9fa747c96c57810f2439950464fb012af751f424:fb4d03dfda4e4e0c24f9a1b43ccd2dacab2bd190"
source 
"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/md4c/OSV-2026-816.yaml"