CVE-2026-76834
- Source
- https://cve.org/CVERecord?id=CVE-2026-76834
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76834.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-76834
- Published
- 2026-09-17T15:16:50Z
- Modified
- 2026-10-28T02:30:49Z
- Severity
-
- 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- b2evolution CMS 6.7.8 through 7.2.5 Object Injection via Negative Integer Array Key
- Details
-
b2evolution CMS versions 6.7.8 through 7.2.5 contain an incomplete fix for CVE-2016-8901 where the serialized-array object check in param_check_serialized_array() fails to reject payloads with negative integer array keys. Unauthenticated attackers can submit crafted serialized PHP objects via POST requests to htsrv/call_plugin.php that bypass validation and reach unserialize(), instantiating arbitrary PHP objects with attacker-chosen properties that may enable code execution if suitable POP gadget chains exist.
- Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-502" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76834.json" }- References
-
- https://b2evolution.net/news/2022/03/26/2022-update-eol
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76834.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-76834
- https://www.vulncheck.com/advisories/b2evolution-cms-6.7.8-through-7.2.5-object-injection-via-negative-integer-array-key
- https://github.com/b2evolution/b2evolution/commit/25c21cf9cc4261324001f9039509710b37ee2c4d
- https://github.com/b2evolution/b2evolution/commit/335abf09bcea61717bd00bc1e3889f8100ebd1bb
- https://github.com/b2evolution/b2evolution/commit/999b5ad1d59760d7e450ceb541f55432fc74cd27
- https://github.com/b2evolution/b2evolution
- https://gist.github.com/axg11/3e29501c33f6e1e05ac2a00107afd64e
- https://github.com/b2evolution/b2evolution/blob/7.2.5/htsrv/call_plugin.php#L49
- https://github.com/b2evolution/b2evolution/blob/7.2.5/inc/_core/_param.funcs.php#L2860
Affected packages
Git / github.com/b2evolution/b2evolution
Affected ranges
- Type
- GIT
- Repo
- https://github.com/b2evolution/b2evolution
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "6.7.8" }, { "last_affected": "7.2.5" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "25c21cf9cc4261324001f9039509710b37ee2c4d" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "999b5ad1d59760d7e450ceb541f55432fc74cd27" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "335abf09bcea61717bd00bc1e3889f8100ebd1bb" } ], "source": "REFERENCES_COMMIT" } ] }