CISA Adds PHP2Shell Flaws CVE-2026-109618 and CVE-2026-109619 to KEV Catalog After Confirmed Exploitation
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two PHP vulnerabilities collectively referred to as PHP2Shell to its Known Exploited Vulnerabilities catalog after confirming real-world exploitation.
The flaws, tracked as CVE-2026-109618 and CVE-2026-109619, permit unauthenticated remote code execution. CVE-2026-109618 arises from insufficient memory handling during resource exhaustion, while CVE-2026-109619 results from improper management of internal state after memory has been freed. Both issues are especially dangerous in PHP deployments that accept external requests, including web applications and APIs.
On October 21 the PHP development team published official updates that resolve the vulnerabilities: PHP 8.5.12, PHP 8.4.27, PHP 8.3.36 and PHP 8.2.35. Source-level patches were also supplied for the unsupported branches PHP 7.4, PHP 8.0 and PHP 8.1, and several Linux distributions have begun back-porting the fixes.
CISA set a strict compliance deadline of October 29 for U.S. federal agencies, requiring both installation of patches and confirmation that no prior compromise has occurred. Organizations running any affected PHP version are urged to apply updates immediately and review logs for signs of exploitation.
Related articles
Apple Releases iOS 27.2 and iPadOS 27.2, Patching 163 Vulnerabilities Including Exploited Flaws in Older Versions
Apple has issued security updates for iOS and iPadOS, addressing a wide range of vulnerabilities across current and legacy operating systems. The iOS 27.2 and iPadOS 27.2 releases fix 163 CVEs affecting WebKit, the kernel, and image processing components. Older branches received targeted patches, with iOS 26.7.2 resolving 134 issues and iOS 18.7.11 addressing three vulnerabilities that include an actively exploited flaw. Specific fixes cover remote code execution risks in WebKit and ImageIO, plus sandbox bypasses. The updates were published on October 26, 2026, and apply to both iPhone and iPad devices. Apple also published detailed security content advisories for each branch.
Security Week 2644: Active Exploitation of PHP2Shell Vulnerabilities Confirmed
PHP developers released patches for two critical vulnerabilities collectively known as PHP2Shell on October 20, affecting PHP 8.2 through 8.5 as well as older branches. The flaws allow unauthenticated remote code execution on affected servers, which power approximately 70 percent of websites. Despite expectations of immediate exploitation, confirmed attacks with working exploits only began on October 25. CrowdStrike noted technical difficulties in weaponizing the issues in real-world environments. Only one-fifth of top Russian websites had applied the fixes by October 25. Additional incidents included compromised eMudhra certificates, a critical GitLab flaw, and a 16-year-old Broadcom router vulnerability.
Positive Technologies Offers Up to 500,000 Rubles for Bypassing PT Application Firewall
Positive Technologies has expanded its Standoff Bug Bounty program to include rewards for bypassing its web application firewalls. Researchers can earn between 150,000 and 500,000 rubles for demonstrating practical bypasses against PT Application Firewall PRO and PT Application Firewall Cloud. The program targets the core protective mechanisms, including traffic filtering, attack detection rules, and the management layer used by administrators. Submissions must include reproducible attack scenarios that show how malicious requests can pass through undetected, rather than relying on scanner reports or theoretical findings. Reward amounts vary by severity and confirmed business impact, with critical issues in the PRO version paying up to 500,000 rubles. The company plans to use validated findings to strengthen detection rules and improve overall product resilience.
Tailscale SSH Vulnerability Allows Root Access via Unix Socket Redirection
A researcher identified flaws in Tailscale that let an attacker with existing SSH access on one node escalate to root privileges and move laterally across the network. Erica Windisch of Cyberdione Labs demonstrated the issues in lab conditions against Tailscale 1.104.2 and Headscale 0.29.5. The core problem stems from privileged operations performed by the tailscaled process when handling Unix socket redirection, granting an ordinary SSH session access to root-only resources. The researcher used the technique to interact with Docker and run elevated commands, and showed that broad access policies allow automated lateral movement in under a second. Additional issues include denial-of-service conditions and bypasses of certain restrictions. Recommendations include reviewing SSH policies and disabling unnecessary socket redirection, noting that Headscale 0.29.5 lacks an independent way to turn the feature off.