CVE-2019-3561
Insufficient boundary checks for the strrpos and strripos functions allow access to out-of-bounds memory.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Insufficient boundary checks for the strrpos and strripos functions allow access to out-of-bounds memory. This affects all supported versions of HHVM (4.0.3, 3.30.4, and 3.27.7 and below).
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.71% probability · 77th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-125
- Affected
- facebook/hhvm
- Source
- cve-assign@fb.com
EPSS 1.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/facebook/hhvm/commit/46003b4ab564b2abcd8470035fc324fe36aa8c75Third Party Advisory
- https://hhvm.com/blog/2019/04/03/hhvm-4.0.4.htmlVendor Advisory
- https://github.com/facebook/hhvm/commit/46003b4ab564b2abcd8470035fc324fe36aa8c75Third Party Advisory
- https://hhvm.com/blog/2019/04/03/hhvm-4.0.4.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.