OSV-2026-736

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Import Source
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libcoap/OSV-2026-736.yaml
JSON Data
https://api.osv.dev/v1/vulns/OSV-2026-736
Published
2026-05-14T00:21:13.271977Z
Modified
2026-05-14T00:21:13.272270Z
Summary
Heap-buffer-overflow in coap_pdu_parse_header
Details

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=512517700

Crash type: Heap-buffer-overflow READ 1
Crash state:
coap_pdu_parse_header
coap_pdu_parse2
coap_pdu_parse
References

Affected packages

OSS-Fuzz / libcoap

Package

Name
libcoap
Purl
pkg:generic/libcoap

Affected ranges

Type
GIT
Repo
https://github.com/obgm/libcoap.git
Events
Introduced
2614649eccf9836355235ef8fab018f2f56669b8
Fixed
c1147eb096b4810354ccb5796c7d4d84fb10980f

Ecosystem specific 

{
    "severity": "MEDIUM"
}

Database specific

introduced_range 
"c99bf12801d845cb6543aea72c12c33ebc07720a:64e2a65ad047e1f9429f4c0b7b838a50bda4b909"
source 
"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libcoap/OSV-2026-736.yaml"