5.3

CVE-2026-39882: OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies

Analyzed
AliasesUBUNTU-CVE-2026-39882DEBIAN-CVE-2026-39882CGA-22ph-4jmr-v947
Published 08-04-2026Last modified 09-04-2026

Vulnerability summary

CVE-2026-39882 is a medium (CVSS 5.3) vulnerability in open-telemetry opentelemetry-go. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 12
OPENSUSE-SU-2026:11619-1OPENSUSE-SU-2026:21483-1OPENSUSE-SU-2026:22125-1SUSE-SU-2026:24381-1SUSE-SU-2026:3713-1SUSE-SU-2026:3714-1

Timeline

  1. 08-04-2026
    PublishedVulnerability first disclosed.
  2. 09-04-2026
    Last modifiedVulnerability information updated.

Description

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.19% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard200 products
  • aactl< 0.4.12-r56
  • addon-resizerAll versions (No fix recorded)
  • addon-resizer-fipsAll versions (No fix recorded)
  • amazon-cloudwatch-agent< 1.300067.0-r1
  • amazon-cloudwatch-agent-fips< 1.300067.0-r2

1 vendor · 200 products · Showing 200 of 1437

References

9 links