CVE-2026-65624 Cowboy HTTP/1.1 max_headers Bypass via Duplicate Header Names Enables Memory Exhaustion

Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowboy allows an unauthenticated remote attacker to exhaust connection process memory over HTTP/1.1. The HTTP/1.1 handler in cowboyhttp enforces the maxheaders limit by counting the number of distinct header names in ...

CVE-2026-59248

CVE-2026-59248 affects cowlib (2.0.0–2.19.0). The HPACK/QPACK dec_big_int/3 decoder has no limit on continuation octets or resulting bit width, causing unbounded memory allocation during decoding and potential memory exhaustion DoS when handling untrusted HTTP/2/3 peers. A single maximal HPACK in...

CVE-2026-59248 Unbounded HPACK/QPACK prefixed-integer decoding in Cowlib causes memory-exhaustion DoS

Allocation of resources without limits vulnerability in ninenines cowlib allows an unauthenticated remote HTTP/2 or HTTP/3 peer to exhaust memory on the vulnerable server or client and cause a denial of service. The HPACK and QPACK prefixed-integer decoder cowhpackcommon:decbigint/3 in...

erlang/otp: erts: otp: Erlang/OTP: Denial of Service via integer underflow in ETF decoding

A flaw was found in Erlang/OTP. A remote attacker can exploit an integer underflow vulnerability in the External Term Format ETF decoder, specifically within the binarytoterm function. By sending a specially crafted ETF payload with a zero-length BITBINARYEXT tag, the attacker can trigger an...

Erlang/OTP: public_key: Erlang/OTP public_key: Denial of Service via crafted TLS certificate chains

A flaw was found in Erlang/OTP's publickey application. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted X.509 certificate chain during a Transport Layer Security TLS handshake. This causes the certificate path validation process to consume excessiv...

erlang/otp: Erlang/OTP ssl client: Authentication bypass via unoffered anonymous cipher suite acceptance

A flaw was found in the Erlang/OTP ssl client. This vulnerability allows an on-path attacker to bypass server authentication in TLS 1.2 and earlier and DTLS connections. By tricking the client into accepting an unoffered anonymous cipher suite, the attacker can complete the handshake without a...

erlang-otp: epmd: Erlang OTP epmd: Remote Denial of Service via connection exhaustion

A flaw was found in Erlang OTP's Erlang Port Mapper Daemon epmd. An unauthenticated remote attacker can exploit an improper handling of exceptional conditions in the doaccept function. By exhausting connection slots through holding numerous TCP connections open and periodically sending data, the...

megaco: Erlang/OTP Megaco Flex Scanner: Remote code execution or denial of service via oversized message

A flaw was found in the Erlang/OTP megaco flex scanner C driver. A remote, unauthenticated attacker can exploit a buffer overflow vulnerability by sending a specially crafted H.248/Megaco message with an oversized property parameter name. This can lead to memory corruption, potentially allowing f...

Critical: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: erlang27: erlang27-27.3.4.15-0.1.hum1 aarch64, x8664 erlang27-asn1-27.3.4.15-0.1.hum1 aarch64, x8664 erlang27-commontest-27.3.4.15-0.1.hum1 aarch64, x8664 erlang27-compiler-27.3.4.15-0.1.hum1...

FreeBSD : Erlang/OTP -- megaco flex scanner buffer overflow (445da2cc-89e1-11f1-b35c-4c526214c986)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 445da2cc-89e1-11f1-b35c-4c526214c986 advisory. https://github.com/erlang/otp/security/advisories/GHSA-7xgh-gmgf-q2g7 reports: A remote unauthenticated...

Linux Distros Unpatched Vulnerability : CVE-2026-59250

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Classic buffer overflow in the Erlang/OTP megaco flex scanner C driver allows a remote unauthenticated attacker to corrupt the driver's memory and potentially...

Linux Distros Unpatched Vulnerability : CVE-2026-59251

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Allocation of resources without limits in Erlang/OTP publickey certificate path validation allows a remote unauthenticated attacker to cause denial of service b...

FreeBSD : Erlang/OTP -- heap corruption decoding invalidly encoded large tuples (445df078-89e1-11f1-b35c-4c526214c986)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 445df078-89e1-11f1-b35c-4c526214c986 advisory. The Erlang/OTP team reports: Fixed heap corruption when an invalidly encoded tuple with an arity of 2^3...

PT-2026-65435

Allocation of resources without limits vulnerability in ninenines cowlib allows an unauthenticated remote HTTP/2 or HTTP/3 peer to exhaust memory on the vulnerable server or client and cause a denial of service. The HPACK and QPACK prefixed-integer decoder cow hpack common:dec big int/3 in src/co...

FreeBSD : Erlang/OTP -- binary_to_term crash on crafted BIT_BINARY_EXT input (445dc6b9-89e1-11f1-b35c-4c526214c986)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 445dc6b9-89e1-11f1-b35c-4c526214c986 advisory. https://github.com/erlang/otp/security/advisories/GHSA-54pw-5645-jh86 reports: A specially crafted...

FreeBSD : Erlang/OTP -- denial of service via exponential certificate policy tree growth (445d674f-89e1-11f1-b35c-4c526214c986)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 445d674f-89e1-11f1-b35c-4c526214c986 advisory. https://github.com/erlang/otp/security/advisories/GHSA-622p-qfh6-c352 reports: A remote attacker can...

Linux Distros Unpatched Vulnerability : CVE-2026-54890

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Integer Underflow Wrap or Wraparound vulnerability in erlang otp erlang/otp erts modules, erlang otp erts erts modules allows Forced Integer Overflow, Excessive...

Linux Distros Unpatched Vulnerability : CVE-2026-55737

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term...

FreeBSD : Erlang/OTP -- TLS denial of service using invalid certificate chains (445d3f14-89e1-11f1-b35c-4c526214c986)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 445d3f14-89e1-11f1-b35c-4c526214c986 advisory. https://github.com/erlang/otp/security/advisories/GHSA-r5jr-mq46-vmhw reports: A TLS/DTLS peer can cras...

FreeBSD : Erlang/OTP -- denial of service in epmd (445e3324-89e1-11f1-b35c-4c526214c986)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 445e3324-89e1-11f1-b35c-4c526214c986 advisory. The Erlang/OTP team reports: Mitigated a denial of service attack in epmd. Tenable has extracted the...