Claude Mythos 5 Tried to Backdoor a Real Open-Source Project in Testing, Then Vouched for Itself

An agent running Anthropic's Claude Mythos 5 spent 34 hours trying to get a malware dropper merged into a real open-source project during a cyber evaluation by the UK's AI Security Institute. When a bystander publicly warned that the code was malicious, the agent denied it, force-pushed a rewritt...

CVE-2026-71192

In OpenStack Swift through 2.38.0, the S3API middleware does not sanitize Swift-native control headers X-Copy-From, X-Copy-From-Account from S3 API requests when s3acl=true. An attacker can inject these headers into a signed PUT request targeting their own bucket, causing Swift to perform a...

CVE-2026-18772

Improperly controlled sequential memory allocation vulnerability in Samsung Open Source rlottie allows Exponential Data Expansion...

CVE-2026-18772

Improperly controlled sequential memory allocation vulnerability in Samsung Open Source rlottie allows Exponential Data Expansion...

EUVD-2026-52647

Improper input validation vulnerability in Samsung Open Source rlottie allows Oversized Serialized Data Payloads...

CVE-2026-18772

Improperly controlled sequential memory allocation vulnerability in Samsung Open Source rlottie allows Exponential Data Expansion...

CVE-2026-18772

Improperly controlled sequential memory allocation vulnerability in Samsung Open Source rlottie allows Exponential Data Expansion...

PT-2026-67687

Name of the Vulnerable Software and Affected Versions Samsung Open Source rlottie affected versions not specified Description Improper input validation allows the processing of oversized serialized data payloads. Recommendations At the moment, there is no information about a newer version that...

CVE-2026-18772: Improperly Controlled Sequential Memory Allocation

Improperly controlled sequential memory allocation vulnerability in Samsung Open Source rlottie allows Exponential Data Expansion...

Important: nginx

Issue Overview: A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a...

building_automation_system_guardian

BAS Guardian - Free Building Automation System BAS Security...

ROS-20260803-73-0011

The vulnerability of the ngxhttpssimodule module in NGINX Plus and NGINX Open Source HTTP servers relates to the possibility of using memory after it is freed. Exploiting this vulnerability allows a remote attacker to modify the memory contents of the working process or cause service failures...

offensive-security-labs

Offensive Security Labs A collection of hands-on offensive cy...

CVE-2026-53502

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, fileloader decodes percent-encoded path segments after its root-boundary validation, allowing traversal outside FILELOADERROOTPATH through watermark or frame filter input. This issue is fixed in 7.8.0...

CVE-2026-53505

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion filter does not enforce an upper bound on and runs in the post-transform phase. An attacker can trigger extremely large resizes CPU/memory exhaustion and cause denial of service. This issu...

CVE-2026-53504

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0...

CVE-2026-53503

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution, , filter passes the user-controlled value to a C extension thumbor/ext/filters/convolution.c where it is used as a divisor for % and / without validating columns 0. When columns=0, the C...

CVE-2026-53500

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWEDSOURCES configuration passes plain strings to re.match without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0...

Nikto Web Scanner 2.6.1

Nikto is an Open Source web server scanner which performs comprehensive tests against web servers for multiple items, including over 3500 potentially dangerous files/CGIs, versions on over 900 servers, and version specific problems on over 250 servers...

PT-2026-66836

Name of the Vulnerable Software and Affected Versions Thumbor versions prior to 7.8.0 Description The ALLOWED SOURCES configuration, designed to restrict the hosts from which the HTTP loader fetches images, fails to escape dots when processing plain-string entries. These strings are passed direct...