CVE-2026-114603: OpenTelemetry Python provides the Python API and SDK for OpenTelemetry

Routine

MEDIUM 5.3REMOTE

CVE-2026-114603 is a medium-severity flaw (CVSS 5.3) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenTelemetry Python provides the Python API and SDK for OpenTelemetry. Prior to 1.45.1, the opentelemetry-api function TraceState.from_header in opentelemetry/trace/span.py, reached through TraceContextTextMapPropagator.extract, parses inbound W3C tracestate headers with an unbounded optional-whitespace regular expression. A malformed header containing a long run of spaces or tabs without a following comma causes quadratic backtracking before th

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-400, CWE-1333
Published	2026-10-22
Last modified	2026-10-22

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-22Published CVE record published
2026-10-22 17:29 UTCUpdated Record last modified

Exact fixes by distribution

Python (pip) · opentelemetry-api · FIXED · 1.45.1 · vulnerable: <= 1.45.0 · source

pip install --upgrade "opentelemetry-api>=1.45.1" pip show opentelemetry-api

Fedora 46 · sugar-calculator · FIXED · 47-14.fc46 · FEDORA-2026-38eeb9e279 · source

sudo dnf upgrade --advisory=FEDORA-2026-38eeb9e279

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

RHEL AI (RHEL AI) 3 · rhelai3/bootc-aws-cuda-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-azure-cuda-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-azure-rocm-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-cuda-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-gaudi-rhel9 · DEFERRED

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-114603?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-114603 being exploited?

CVE-2026-114603 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-114603 affect?

CVE-2026-114603 affects affected software. Severity is medium (CVSS 5.3). OpenTelemetry Python provides the Python API and SDK for OpenTelemetry. Prior to 1.45.1, the opentelemetry-api function TraceState.from_header in opentelemetry/trace/span.py, reached through TraceContextTextMapPropagator.extract, parses inb

How urgent is CVE-2026-114603?

Priority 34/100. Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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