CVE Explorer
CVE-2026-44375
Nerdbank.MessagePack is a NativeAOT-compatible MessagePack serialization library. Prior to 1.1.62, Nerdbank.MessagePack contains an uncontrolled stack allocation vulnerability in DateTime decoding. A malicious MessagePack payload can declare an oversized timestamp extension length, causing the reader to allocate an attacker-controlled number of bytes on the stack. This can trigger a StackOverflowException, which is not catchable by user code and terminates the process. This vulnerability is fixe
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"Nerdbank.MessagePack","vendor":"AArnott","versions":[{"status":"affected","version":"< 1.1.62"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:b0c2759d8c7ca69abb92fe38a019b849601d673810db9bcd229199f6c93ceb73 · sha256:f0717d92061ada84… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:b0c2759d8c7ca69abb92fe38a019b849601d673810db9bcd229199f6c93ceb73 · sha256:f0717d92061ada84… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-789","description":"CWE-789: Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:b0c2759d8c7ca69abb92fe38a019b849601d673810db9bcd229199f6c93ceb73 · sha256:f0717d92061ada84… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/AArnott/Nerdbank.MessagePack/commit/7d1eb319cfabe7280e70699946c9a48579fa2f30","tags":["x_refsource_MISC"],"url":"https://github.com/AArnott/Nerdbank.MessagePack/commit/7d1eb319cfabe7280e70699946c9a48579fa2f30"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b0c2759d8c7ca69abb92fe38a019b849601d673810db9bcd229199f6c93ceb73 · sha256:f0717d92061ada84… · /containers/cna/references/2
{"name":"https://github.com/AArnott/Nerdbank.MessagePack/pull/941","tags":["x_refsource_MISC"],"url":"https://github.com/AArnott/Nerdbank.MessagePack/pull/941"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b0c2759d8c7ca69abb92fe38a019b849601d673810db9bcd229199f6c93ceb73 · sha256:f0717d92061ada84… · /containers/cna/references/1
{"name":"https://github.com/AArnott/Nerdbank.MessagePack/releases/tag/v1.1.62","tags":["x_refsource_MISC"],"url":"https://github.com/AArnott/Nerdbank.MessagePack/releases/tag/v1.1.62"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b0c2759d8c7ca69abb92fe38a019b849601d673810db9bcd229199f6c93ceb73 · sha256:f0717d92061ada84… · /containers/cna/references/3
{"name":"https://github.com/AArnott/Nerdbank.MessagePack/security/advisories/GHSA-2cwq-pwfr-wcw3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/AArnott/Nerdbank.MessagePack/security/advisories/GHSA-2cwq-pwfr-wcw3"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b0c2759d8c7ca69abb92fe38a019b849601d673810db9bcd229199f6c93ceb73 · sha256:f0717d92061ada84… · /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.