Cisco patched a high-severity denial-of-service flaw in Cisco Crosswork Network Controller (CNC) and Cisco Network Services Orchestrator (NSO) that lets unauthenticated remote attackers exhaust connection resources and force the system into an unresponsive state. CVE-2026-20188. Recovery requires manual reboot. Cisco's PSIRT has not seen exploitation in the wild yet, but Cisco previously patched similar DoS bugs (CVE-2025-20362, CVE-2025-20333) that ended up being weaponized to force ASA and FTD firewalls into reboot loops, which CISA addressed with an emergency directive in November 2025.
Apache patched a double-free vulnerability in mod_http2 yesterday. CVE-2026-23918 (CVSS 8.8) lets a remote attacker crash the server immediately, with a path to remote code execution under specific memory-layout conditions. The bug is in the stream cleanup code in h2_mplx.c and is triggered by a crafted sequence of HTTP/2 frames including an early stream reset. mod_http2 ships in default Apache builds and HTTP/2 is widely enabled in production. The MPM prefork worker is not affected. Researchers warn practical RCE requires an info leak and probabilistic heap spray, but in lab conditions execution lands in minutes.
Progress Software released emergency patches Sunday for two MOVEit Automation flaws. The worst, CVE-2026-4670 (CVSS 9.8), lets remote attackers reach the management interface without logging in - and from there take administrative control. Airbus researchers disclosed both flaws privately and Progress hasn't seen exploitation in the wild, but the comparison with MOVEit's history is uncomfortable: the Cl0p ransomware gang exploited MOVEit Transfer in 2023 to steal data from 2,100 organizations and 62 million individuals. Shodan shows 1,400+ MOVEit Automation instances exposed online, including a dozen linked to US local and state government agencies.
Google patched a critical flaw in Gemini CLI, the command-line tool developers use to interact with Gemini models from CI pipelines and dev workstations. CVSS 10.0. The bug let an attacker execute arbitrary code on the developer's machine by feeding crafted input to the CLI - specifically through the same pattern that compromised LiteLLM and several other AI tools recently. A separate but related set of flaws in Cursor, the AI-powered IDE, also enables code execution. The pattern across all these AI dev tools is the same: input validation gaps where attacker-controlled prompts or model output reach a shell or code execution path.
Update on the GitHub flaw covered yesterday: Wiz, who found the bug, published its full disclosure showing 88% of self-hosted GitHub Enterprise Servers were still unpatched at public disclosure on April 28. The bug let any user with push access to one repository run code on the GitHub server itself with a single 'git push'. On GitHub.com, the same bug exposed millions of public and private repositories belonging to other users sharing the same storage node. GitHub.com was patched within 75 minutes, but Enterprise Server installs need patching manually. Wiz found the bug using AI-augmented reverse engineering on closed-source GitHub binaries.
Aisle, an AI-driven application security firm, ran its analyzer over OpenEMR's source code and found 38 previously unknown vulnerabilities, including two with maximum severity (CVSS 10.0). OpenEMR is the open-source electronic health records system used by 100,000 healthcare providers serving 200 million patients. The two critical bugs let attackers reach into patient databases without logging in: CVE-2026-24898 lets any unauthenticated visitor receive the medical practice's API tokens by sending a single POST request, and CVE-2026-24908 is a SQL injection in the patient REST API. OpenEMR has now patched all 38.
Researchers at Theori and Xint disclosed Copy Fail yesterday, a Linux kernel bug introduced in 2017 that lets any unprivileged user with shell access become root in seconds. The exploit is a 732-byte Python script that works without version-specific tweaks on every major Linux distribution since 2017 - Ubuntu, Amazon Linux, RHEL, SUSE. Unlike previous kernel bugs (Dirty Cow, Dirty Pipe), Copy Fail has no race condition and no per-kernel offsets. It also leaves no trace on disk because it only modifies the in-memory page cache. The bug was found using AI-assisted reverse engineering and has been hiding in the open for nearly nine years.
SonicWall released emergency firmware updates for Gen 6, Gen 7, and Gen 8 firewalls after CrowdStrike's research team disclosed three SonicOS flaws on April 29. The worst is CVE-2026-0204 (CVSS 8.0), a weak authentication bug in the management interface that lets an attacker on an adjacent network reach management functions without logging in - and from there change firewall rules, disable security protections, or open new holes. The other two are post-authentication: CVE-2026-0205 is a path traversal that breaks out of restricted directories, and CVE-2026-0206 is a buffer overflow that crashes the firewall. No public exploits yet.
LiteLLM, the popular open-source gateway used to centralize API access for OpenAI, Anthropic, and other AI providers, has a critical pre-authentication SQL injection bug that attackers started exploiting just 36 hours after the security advisory went public. The flaw lets anyone who can reach the proxy port read all the API keys stored inside - including master keys, virtual keys, and provider credentials. The bug was in the bearer-token check: the token was concatenated into a SQL query instead of passed as a parameter. Sysdig saw the first attack at 04:24 UTC on April 26, hitting three tables that hold the most valuable secrets.
Researchers disclosed CVE-2026-3854, a critical GitHub Enterprise Server flaw that lets anyone with push access execute arbitrary commands on the GitHub server with a single git push. The bug is in how Enterprise Server handles repository hooks during push operations - a crafted commit message or filename bypasses the sanitization that normally prevents shell injection. GitHub patched it last week, but self-hosted instances need to apply the patch manually, and telemetry shows most haven't yet. Anyone with developer-level access to a vulnerable Enterprise Server can take over the entire instance, then pivot into every repository and CI/CD secret it hosts.
TrustStrike Labs