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NVD / CVE Program· CNA GitHub_M

CVE-2026-41178: OpenTelemetry-Go's baggage parsing no longer caps raw header length

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.33% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: opentelemetry-collector (AlmaLinux:10) 0.152.1-2.el10_2; osbuild-composer (AlmaLinux:10) 165.1-5.el10_2.alma.1; osbuild-composer-core (AlmaLinux:10) 165.1-5.el10_2.alma.1.

Low priority for now. Upgrade to opentelemetry-collector (AlmaLinux:10) 0.152.1-2.el10_2; osbuild-composer (AlmaLinux:10) 165.1-5.el10_2.alma.1; osbuild-composer-core (AlmaLinux:10) 165.1-5.el10_2.alma.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Jun 4, 2026
Updated
Jul 22, 2026
EPSS
0.3% · 27th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
5.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-41178

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
opentelemetryopentelemetry

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • opentelemetry opentelemetrybefore 1.42.0
  • opentelemetry opentelemetry1.43.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • open-telemetry go.opentelemetry.io/otel/baggage

    • = 1.41.0, = 1.43.0affected

  • open-telemetry go.opentelemetry.io/otel/propagation

    • = 1.41.0, = 1.43.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10opentelemetry-collectorbefore 0.152.1-2.el10_20.152.1-2.el10_2
AlmaLinux:10osbuild-composerbefore 165.1-5.el10_2.alma.1165.1-5.el10_2.alma.1
AlmaLinux:10osbuild-composer-corebefore 165.1-5.el10_2.alma.1165.1-5.el10_2.alma.1
AlmaLinux:10osbuild-composer-workerbefore 165.1-5.el10_2.alma.1165.1-5.el10_2.alma.1
AlmaLinux:8osbuild-composerbefore 101.5-3.el8_10.alma.1101.5-3.el8_10.alma.1
AlmaLinux:8osbuild-composer-corebefore 101.5-3.el8_10.alma.1101.5-3.el8_10.alma.1
AlmaLinux:8osbuild-composer-workerbefore 101.5-3.el8_10.alma.1101.5-3.el8_10.alma.1
AlmaLinux:9opentelemetry-collectorbefore 0.152.1-2.el9_80.152.1-2.el9_8
AlmaLinux:9osbuild-composerbefore 165.1-5.el9_8.alma.1165.1-5.el9_8.alma.1
AlmaLinux:9osbuild-composer-corebefore 165.1-5.el9_8.alma.1165.1-5.el9_8.alma.1
AlmaLinux:9osbuild-composer-workerbefore 165.1-5.el9_8.alma.1165.1-5.el9_8.alma.1
Debian:12golang-opentelemetry-otelfrom 0—
Debian:14golang-opentelemetry-otelbefore 1.46.0-21.46.0-2
Gogo.opentelemetry.io/otelfrom 1.41.0 · before 1.42.01.42.0
Gogo.opentelemetry.io/otelfrom 1.43.0 · before 1.44.01.44.0
Gogo.opentelemetry.io/otel/baggagefrom 1.41.0 · before 1.42.01.42.0
Gogo.opentelemetry.io/otel/baggagefrom 1.43.0 · before 1.44.01.44.0
Gogo.opentelemetry.io/otel/propagationfrom 1.41.0 · before 1.42.01.42.0
Gogo.opentelemetry.io/otel/propagationfrom 1.43.0 · before 1.44.01.44.0
openSUSE:Leap 16.0alloybefore 1.19.2-160000.1.11.19.2-160000.1.1
openSUSE:Leap 16.0amazon-ecs-initbefore 1.107.0-160000.1.11.107.0-160000.1.1
openSUSE:Leap 16.0apptainerbefore 1.5.3-bp160.3.11.5.3-bp160.3.1
openSUSE:Leap 16.0cadvisorbefore 0.60.5-bp160.1.10.60.5-bp160.1.1
openSUSE:Leap 16.0cloudflaredbefore 2026.9.1-bp160.1.12026.9.1-bp160.1.1

+96

Same product

opentelemetry: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-47108DoS vulnerability in otelgrpc (uncontrolled resource consumption) due to unbound cardinality metrics
    31Monitor
  • CVE-2026-29181OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)
    30Monitor
  • CVE-2023-45142OpenTelemetry-Go Contrib has DoS vulnerability in otelhttp due to unbound cardinality metrics
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-40894Apr 23, 2026 · OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
    21Monitor
  • ← EarlierCVE-2026-41078Apr 23, 2026 · OpenTelemetry dotnet: Potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path
    23Monitor
  • Later →CVE-2026-44967Jun 12, 2026 · opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:opentelemetry-collector0.152.1-2.el10_2 · AlmaLinux:10Package registry (OSV)
almalinux:osbuild-composer101.5-3.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:osbuild-composer165.1-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:osbuild-composer-core101.5-3.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:osbuild-composer-core165.1-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:osbuild-composer-worker101.5-3.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:osbuild-composer-worker165.1-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
debian:golang-opentelemetry-otel1.46.0-2 · Debian:14Package registry (OSV)
Go:go.opentelemetry.io/otel1.42.0Package registry (OSV)
Go:go.opentelemetry.io/otel1.44.0Package registry (OSV)
Go:go.opentelemetry.io/otel/baggage1.42.0Package registry (OSV)
Go:go.opentelemetry.io/otel/baggage1.44.0Package registry (OSV)
Go:go.opentelemetry.io/otel/propagation1.42.0Package registry (OSV)
Go:go.opentelemetry.io/otel/propagation1.44.0Package registry (OSV)
opensuse:amazon-cloudwatch-agent1.300071.0-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:apptainer1.5.3-3.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:azure-storage-azcopy10.32.7-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:buildpacks-cli0.40.9-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:cadvisor0.60.5-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:coredns1.14.7-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:distribution3.1.1-5.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:hauler2.1.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:helm4.2.4-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:helm33.21.3-6.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:mcphost0.34.0-10.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:trivy0.74.0-2.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:ignition0:2.21.0-7.el9_6.1 · Red Hat:rhel_eus:9.6::appstreamPackage registry (OSV)
red hat:ignition-debuginfo0:2.21.0-7.el9_6.1 · Red Hat:rhel_eus:9.6::appstreamPackage registry (OSV)
red hat:ignition-debugsource0:2.21.0-7.el9_6.1 · Red Hat:rhel_eus:9.6::appstreamPackage registry (OSV)
red hat:ignition-edge0:2.21.0-7.el9_6.1 · Red Hat:rhel_eus:9.6::appstreamPackage registry (OSV)

+25

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4018242 days apartOpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies
    23Monitor
  • CVE-2026-449678 days apartopentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
    21Monitor
  • CVE-2026-4089142 days apartOpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling
    21Monitor
  • CVE-2026-4089442 days apartOpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
    21Monitor
  • CVE-2026-3988257 days apartOpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
    21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-789 · Memory Allocation with Excessive Size Value

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records