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ALSA-2026:65116 — Important: opentelemetry-collector security update

Affected: AlmaLinux:10: opentelemetry-collector

Collector with the supported components for a AlmaLinux build of OpenTelemetry

Security Fix(es):

* net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499) * net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820) * mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504) * github.com/open-telemetry/opentelemetry-go: go.opentelemetry.io/otel/baggage: go.opentelemetry.io/otel/propagation: OpenTelemetry-Go: Denial of Service via oversized baggage headers (CVE-2026-41178) * encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818) * net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860) * net/[http:](http:) golang: Go net/[http:](http:) Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853) * html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858) * crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862) * encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Withdrawn: CLEANSTART-2026-AJ39907 — gRPC-Go is the Go language implementation of gRPC

Withdrawn by the publisher.

Affected: CleanStart: step

Multiple security vulnerabilities affect the step package. gRPC-Go is the Go language implementation of gRPC. See references for individual vulnerability details.

EUVD-2026-324651

fkie_cve-2026-41178

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.

GHSA-5wrp-cwcj-q835 — opentelemetry-go's baggage parsing no longer caps raw header length

Affected: Go: go.opentelemetry.io/otel/baggage, Go: go.opentelemetry.io/otel/propagation

### Summary

https://github.com/open-telemetry/opentelemetry-go/pull/7880 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs.

### Details

The commit removes the upfront baggage-string length check and the per-member size guard in parsing. `Parse` now walks the entire input with `strings.SplitSeq` and skips invalid members while continuing to process the rest. For very large or malformed `baggage` headers, the parser still fully tokenizes and percent-decodes each member, and errors are forwarded to the global error handler (default logging). This lets a remote client send oversized/invalid headers to trigger excessive CPU/memory work and potentially large log output before any size limit is enforced, creating a denial-of-service risk in services that do not already enforce strict header size limits.

Summary: - In `baggage/baggage.go`, `parseMember` performs full parsing and `PathUnescape` on the entire member without any size guard, amplifying work for large inputs. `Parse` no longer checks bStr length and continues processing invalid members, so oversized/invalid headers are fully parsed instead of being rejected early. - In `propagation/baggage.go`, parsing errors from attacker-controlled headers are sent to the global error handler (default logging), which can amplify oversized-input impact.

### PoC

[baggage_dos_poc.tar.gz](https://github.com/user-attachments/files/…

openSUSE-SU-2026:11493-1 — buildpacks-cli-0.40.9-1.1 on GA media

buildpacks-cli-0.40.9-1.1 on GA media

RHSA-2026:54773 — Red Hat Security Advisory: Red Hat build of OpenTelemetry 3.10.2 release

golang: Go os.Root: Symlink following vulnerability allows directory traversal github.com/open-telemetry/opentelemetry-go: go.opentelemetry.io/otel/baggage: go.opentelemetry.io/otel/propagation: OpenTelemetry-Go: Denial of Service via oversized baggage headers crypto/tls: golang: Go crypto/tls: Information disclosure in Encrypted Client Hello golang.org/x/net/dns/dnsmessage: golang.org/x/net/dns/dnsmessage: Denial of Service via invalid DNS record parsing golang.org/x/text: golang.org/x/text: Denial of Service via invalid UTF-8 input

RLSA-2026:65116 — Important: opentelemetry-collector security update

Affected: Rocky Linux:10: opentelemetry-collector

Collector with the supported components for a Rocky Enterprise Software Foundation build of OpenTelemetry

Security Fix(es):

* net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)

* net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820)

* mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504)

* github.com/open-telemetry/opentelemetry-go: go.opentelemetry.io/otel/baggage: go.opentelemetry.io/otel/propagation: OpenTelemetry-Go: Denial of Service via oversized baggage headers (CVE-2026-41178)

* encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)

* net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)

* net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)

* html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858)

* crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)

* encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

SUSE-SU-2026:23456-1 — Security update for helm

Security update for helm

UBUNTU-CVE-2026-41178

Affected: Ubuntu:22.04:LTS: golang-opentelemetry-otel, Ubuntu:24.04:LTS: golang-opentelemetry-otel, Ubuntu:25.10: golang-opentelemetry-otel, Ubuntu:26.04:LTS: golang-opentelemetry-otel

WID-SEC-W-2026-3498 — Red Hat OpenShift Container Platform (opentelemetry-go, qs.stringify): Mehrere Schwachstellen ermöglichen Denial of Ser…

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat OpenShift Container Platform ausnutzen, um einen Denial of Service Angriff durchzuführen.