CVE-2019-11929 json
Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory, potentially leading…
published 2019-10-02 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-3587
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.0%
- EPSS 4.0% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known
Summary
Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory, potentially leading to remote code execution. This issue affects HHVM versions prior to 3.30.10, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.18.2, and versions 4.19.0, 4.19.1, 4.20.0, 4.20.1, 4.20.2, 4.21.0, 4.22.0, 4.23.0.
Patch / fix
Exploit prediction
4.03% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Facebook HHVM
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
-
github.com
/facebook/hhvm/commit/dbeb9a56a638e3fdcef8b691c2a2967132dae692
patch, third-party-advisory
-
hhvm.com
/blog/2019/09/25/security-update.html
vendor-advisory
-
facebook.com
/security/advisories/cve-2019-11929
third-party-advisory
Sources
- CVE List CVE-2019-11929
- NVD CVE-2019-11929
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