October 20, 2026

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
UNKNOWN
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)
CWE-476: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 2.1 (LOW)
Attack VectorNetwork
Attack ComplexityHigh
Attack RequirementsPresent
Privileges RequiredNone
User InteractionActive
Confidentiality (Vulnerable System)None
Integrity (Vulnerable System)None
Availability (Vulnerable System)Low
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)Low

Affected & Patched Versions

Affected Versions
  • PHP Group PHP >= 8.2.* and < 8.2.31
  • PHP Group PHP >= 8.3.* and < 8.3.31
  • PHP Group PHP >= 8.4.* and < 8.4.21
  • PHP Group PHP >= 8.5.* and < 8.5.6
Patched Versions
  • PHP Group PHP 8.2.31
  • PHP Group PHP 8.3.31
  • PHP Group PHP 8.4.21
  • PHP Group PHP 8.5.6
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈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.
🚫Ad-Free — Uninterrupted experience.

External References