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CVE-2026-0819

A stack buffer overflow vulnerability exists in wolfSSL's PKCS7 SignedData encoding functionality. In wc_PKCS7_BuildSignedAttributes(), when adding custom signed attributes, the code passes an incorrect capacity value (esd->signedAttribsCount) to EncodeAttributes() instead of the remaining available space in the fixed-size signedAttribs[7] array. When an application sets pkcs7->signedAttribsSz to a value greater than MAX_SIGNED_ATTRIBS_SZ (default 7) minus the number of default attributes alread
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:aebe81271ae8ad72b0129d56c0a0c15feb8f5499b101c0a4a2ac241f8938244f
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-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:80c17314816699a4333a50160e8067ec68b0878cb0033fde817006569108d79b · sha256:06d6e59e6e6cd0bc… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:80c17314816699a4333a50160e8067ec68b0878cb0033fde817006569108d79b · sha256:06d6e59e6e6cd0bc… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","modules":["wolfcrypt PKCS7"],"product":"wolfSSL","programFiles":["wolfcrypt/src/pkcs7.c"],"programRoutines":[{"name":"wc_PKCS7_EncodeSignedData()"}],"repo":"https://github.com/wolfSSL/wolfssl","vendor":"wolfSSL","versions":[{"lessThan":"5.9.0","status":"affected","version":"5.5.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:80c17314816699a4333a50160e8067ec68b0878cb0033fde817006569108d79b · sha256:06d6e59e6e6cd0bc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":2.2,"baseSeverity":"LOW","exploitMaturity":"UNREPORTED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:80c17314816699a4333a50160e8067ec68b0878cb0033fde817006569108d79b · sha256:06d6e59e6e6cd0bc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:80c17314816699a4333a50160e8067ec68b0878cb0033fde817006569108d79b · sha256:06d6e59e6e6cd0bc… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:80c17314816699a4333a50160e8067ec68b0878cb0033fde817006569108d79b · sha256:06d6e59e6e6cd0bc… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion
{"name":"GitHub Pull Request","url":"https://github.com/wolfSSL/wolfssl/pull/9630"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:80c17314816699a4333a50160e8067ec68b0878cb0033fde817006569108d79b · sha256:06d6e59e6e6cd0bc… · /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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