SB20260831123 - Red Hat Enterprise Linux 8 update for the nodejs:22 module
Published: August 31, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 13 vulnerabilities.
1) Cross-site scripting (CVE-ID: CVE-2026-42338)
CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
The vulnerability allows a remote attacker to execute arbitrary script in a victim\'s browser.
The vulnerability exists due to cross-site scripting in Address6.group(), Address6.link(), and AddressError.parseMessage handling when rendering untrusted Address6 input or related HTML output as HTML. A remote attacker can supply crafted input or option values to inject script and execute arbitrary script in a victim\'s browser.
User interaction is required because a victim application must render the returned HTML or parseMessage as HTML.
2) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-12151)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the WebSocket client message fragmentation handling when processing fragmented WebSocket messages from a server. A remote attacker can send many small or empty continuation frames to cause a denial of service.
Exploitation requires the application to connect to an attacker-controlled or compromised WebSocket endpoint using the WebSocket client or the WebSocketStream API.
3) Use of cache containing sensitive information (CVE-ID: CVE-2026-9678)
CWE-ID: CWE-524 - Use of Cache Containing Sensitive Information
CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to use of cache containing sensitive information in the cache interceptor when processing responses with whitespace-padded qualified private or no-cache directives in the Cache-Control header. A remote attacker can send requests that resolve to the same cache key to disclose sensitive information.
Only applications that explicitly enable interceptors.cache() in shared-cache mode, forward Authorization headers upstream, and receive cacheable responses with non-canonical qualified directives are vulnerable.
4) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-6733)
CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause responses to be delivered to the wrong requests.
The vulnerability exists due to a time-of-check time-of-use race condition in the HTTP/1.1 client when reusing keep-alive sockets. A remote attacker can inject an unsolicited HTTP/1.1 response onto an idle socket to cause responses to be delivered to the wrong requests.
Exploitation requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse.
5) Permissive List of Allowed Inputs (CVE-ID: CVE-2026-11525)
CWE-ID: CWE-183 - Permissive List of Allowed Inputs
CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to weaken SameSite cookie policy enforcement.
The vulnerability exists due to permissive list of allowed inputs in the Set-Cookie header parser when parsing Set-Cookie headers from server responses. A remote attacker can send a specially crafted Set-Cookie header to weaken SameSite cookie policy enforcement.
The issue affects applications that forward or rely on the parsed sameSite attribute from server responses.
6) Resource exhaustion (CVE-ID: CVE-2026-48619)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in node:http2 clients when processing attacker-controlled ORIGIN frames. A remote attacker can send an unlimited number of ORIGIN frames to cause a denial of service.
The issue can lead to an out-of-memory condition on the client.
7) Improper Null Termination (CVE-ID: CVE-2026-48930)
CWE-ID: CWE-170 - Improper Null Termination
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass hostname-based authority checks.
The vulnerability exists due to c-string truncation in resolver bindings in TLS hostname handling when processing hostnames containing an embedded nul character. A remote attacker can present a crafted hostname to bypass hostname-based authority checks.
8) Improper access control (CVE-ID: CVE-2026-48935)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to modify file metadata outside intended permission restrictions.
The vulnerability exists due to improper access control in FileHandle.utimes() in the promises API when enforcing read-only filesystem permissions. A local user can invoke FileHandle.utimes() on a read-only path to modify file metadata outside intended permission restrictions.
9) Integer overflow (CVE-ID: CVE-2026-48933)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer overflow in the WebCrypto subtle.encrypt() implementation when processing input whose size is a multiple of 2 gib. A remote attacker can supply crafted input to cause a denial of service.
10) Improper Certificate Validation (CVE-ID: CVE-2026-48934)
CWE-ID: CWE-295 - Improper Certificate Validation
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass certificate validation.
The vulnerability exists due to improper certificate validation in TLS host verification when reusing a session with a different servername. A remote attacker can reuse a session with a different servername to bypass certificate validation.
11) Improper validation of certificate with host mismatch (CVE-ID: CVE-2026-48928)
CWE-ID: CWE-297 - Improper Validation of Certificate with Host Mismatch
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass mTLS authorization.
The vulnerability exists due to case-sensitive hostname matching in SNI context matching when selecting contexts in multi-context mTLS setups. A remote attacker can use an uppercase hostname to bypass mTLS authorization.
12) Inclusion of Sensitive Information in Log Files (CVE-ID: CVE-2026-48615)
CWE-ID: CWE-532 - Information Exposure Through Log Files
CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper handling of sensitive information in ERR_PROXY_TUNNEL error messages when processing proxy URLs with embedded credentials. A remote user can trigger an error handling path to disclose sensitive information.
The exposed data may be captured by logs, diagnostics, or other error consumers.
13) Input validation error (CVE-ID: CVE-2026-48618)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass tls wildcard-depth authentication.
The vulnerability exists due to improper input validation in TLS hostname handling when normalizing hostnames with unicode dot separators. A remote attacker can present a crafted hostname to bypass tls wildcard-depth authentication.
This can lead to confidentiality impact or bypass of the intended security boundary under affected configurations.
Remediation
Install update from vendor's website.