# CVE-2026-119723: CVE-2026-119723

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

When parsing request variables such as query-string and form parameters, HHVM did not check that appending a nested array succeeded before descending into it. A remote, unauthenticated attacker could send a GET or POST request which would crash the HHVM server process before any application code runs, leading to denial of service. This issue affected HHVM prior to 23c061f4e804a51badd5f85227e65185651253b5.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Facebook / HHVM: ≥ 0; < 23c061f4e804a51badd5f85227e65185651253b5 (affected, git). Source: CNA: Meta

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-843

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.facebook.com/security/advisories/cve-2026-119723 (CNA: Meta; x_refsource_CONFIRM)

- https://github.com/meta/hhvm/commit/23c061f4e804a51badd5f85227e65185651253b5 (CNA: Meta; x_refsource_MISC)

- https://github.com/meta/hhvm/commit/23c061f4e804a51badd5f85227e65185651253b5 (cve-assign@fb.com)

- https://www.facebook.com/security/advisories/cve-2026-119723 (cve-assign@fb.com)

## Provenance

- CNA: Meta: https://www.cve.org/CVERecord?id=CVE-2026-119723; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119723; retrieved 2026-11-11; source updated 2026-11-11

Revision: 020f0415a54716f2f0397659b23600290f633827700869586776b88a77fdc3bf

Canonical: https://y2.dev/cve/CVE-2026-119723

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