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CVE-2019-11935

Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory. This issue affects HHVM…

Critical9.8EPSS 1.5%
Published
Updated
Reserved
Assigned by
facebook

Description

Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.

Scores

CVSS scores of CVE-2019-11935, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
1.5% · top 26% of all CVEs (6 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

Affected products

  • Facebook · HHVM

    • affected 4.28.2
    • affected 4.28.0 – < unspecified
    • affected 4.27.1
    • affected 4.27.0 – < unspecified
    • affected 4.26.1
    • affected 4.26.0 – < unspecified
    • affected 4.25.1
    • affected 4.25.0 – < unspecified
    • affected 4.24.1
    • affected 4.24.0 – < unspecified
    • affected 4.23.2
    • affected 4.9.0 – < unspecified
    • affected 4.8.6
    • affected 4.0.0 – < unspecified
    • affected 3.30.12
    • affected unspecified – < 3.30.12

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .