CVE Watchtower

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CVE-2026-7259NVD

Vulnerability Summary

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to  a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().
Severity Level
LOW
Published Date
May 10, 2026
Last Modified
May 11, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.08%Probability
Root Weakness (CWE)
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

Affected & Patched Versions

Affected Versions
  • ext-mbstring < 8.5.6
  • ext-mbstring < 8.4.21
  • ext-mbstring < 8.3.31
  • ext-mbstring < 8.2.31
Patched Versions
  • ext-mbstring 8.5.6
  • ext-mbstring 8.4.21
  • ext-mbstring 8.3.31
  • ext-mbstring 8.2.31
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📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
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