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go vulnerability

About this tag
The go vulnerability tag covers security flaws in the Go standard library, including CVEs in crypto/x509, go/parser, net/mail, encoding/pem, archive/tar, and hostname validation. Recurring themes include denial-of-service via panic, stack exhaustion, quadratic-time parsing, and unbounded memory allocations. Microsoft's Azure Linux distribution is frequently attested as a carrier of vulnerable Go code, but these attestations are product-level inventory statements, not guarantees that other Microsoft products are unaffected. Discussions emphasize the need for prompt patching to Go 1.22.7, 1.23.1, or later releases and caution against assuming limited scope based on partial attestations.
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    CVE-2026-25680 Go HTML Parser DoS: Windows Teams Must Patch golang.org/x/net

    CVE-2026-25680 is a Go vulnerability published on May 22, 2026, affecting golang.org/x/net before version 0.55.0, where the html parser can spend excessive CPU time processing attacker-supplied HTML and cause denial of service in applications that parse untrusted markup. The bug is not...
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    • dependency management go vulnerability html parser dos windows server
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    • Forum: Security Alerts
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    Go HTTP/2 x/net vulnerability: nil pointer crash from 0x0a–0x0f frames

    A newly disclosed vulnerability in the golang.org/x/net HTTP/2 implementation can be triggered by sending a narrow range of HTTP/2 frame types (0x0a–0x0f), causing a nil-pointer panic that crashes servers using affected module versions — a denial-of-service vector that is easy to trigger from...
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    • dependency security go vulnerability http2 security x net vulnerability
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    • Forum: Security Alerts
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    Go 1.18 macOS TLS Panic CVE-2022-27536: Upgrade to 1.18.1 Now

    The Go standard library shipped a quiet but consequential panic bug in its X.509 verification path: CVE‑2022‑27536 allowed a remote TLS server to deliver specially malformed certificates that would cause crypto/x509.Certificate.Verify to panic on macOS, crashing TLS clients built with Go 1.18.0...
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    • certificate panic go vulnerability macos security tls security
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    • Forum: Security Alerts
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    Go Parser Stack Exhaustion CVE-2024-34155: Fixes and Azure Linux Attestation

    Calling any of Go's Parse* functions on specially crafted, deeply nested source can exhaust the stack and trigger a panic — a vulnerability tracked as CVE-2024-34155 that sits in the go/parser standard library and has been fixed in the Go 1.22.7 and 1.23.1 releases; Microsoft’s public...
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    • azure linux go parser go vulnerability supply chain security
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    • Forum: Security Alerts
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    Azure Linux Attestation for CVE-2025-58187: Not a Microsoft Global Guarantee

    Microsoft’s public advisory for CVE‑2025‑58187 names Azure Linux as a product that “includes this open‑source library and is therefore potentially affected,” but that statement is a product‑level attestation — not a categorical guarantee that no other Microsoft product can include the same...
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    • attestation azure linux certificate validation go vulnerability
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    • Forum: Security Alerts
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    Go net/mail Vulnerability CVE-2025-61725: Azure Linux Attestation and Mitigation

    The short answer is: No — Azure Linux is not necessarily the only Microsoft product that can include the vulnerable code, but it is the only Microsoft product Microsoft has publicly attested as including the affected Go standard‑library component so far; absence of additional attestations is not...
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    • azure linux csaf vex attestations go vulnerability windows mail
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    • Forum: Security Alerts
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    CVE-2025-61723: Azure Linux Attestation and Go encoding pem Risk

    Microsoft’s MSRC entry for CVE-2025-61723 names the Go standard library package encoding/pem as vulnerable to a quadratic‑time parsing condition but explicitly ties Microsoft’s public product-level attestation to Azure Linux — and that attestation is a statement of inventory for that product...
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    • azure linux encoding pem go vulnerability vulnerability management
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    • Forum: Security Alerts
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    Go CVE-2025-61729 DoS in crypto x509 hostname validation

    A newly published vulnerability in Go's standard library, tracked as CVE-2025-61729, exposes a denial-of-service vector in the crypto/x509 package: the HostnameError.Error method will print an unbounded number of hosts and constructs the error text via repeated string concatenation, producing...
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    • crypto x509 denial of service go vulnerability hostname validation
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    • Forum: Security Alerts
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    CVE-2025-58183 Go archive tar Unbounded Allocations and Azure Linux Attestation

    A critical memory-allocation flaw in the Go standard library’s archive/tar package (tracked as CVE-2025-58183) can cause a Go program to perform unbounded allocations when parsing GNU pax-format sparse maps, producing an out-of-memory condition and a possible denial-of-service. Microsoft’s...
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    • archive tar azure linux cve 2025 58183 go vulnerability
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    • Forum: Security Alerts
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