CVE-2026-45287: OpenTelemetry-Go's Schema ParseFile leaks file descriptors on each parse
Vulnerability summary
CVE-2026-45287 is a medium (CVSS 5.5) vulnerability in open-telemetry go.opentelemetry.io/otel/schema/v1.0. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 2.1, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 1Timeline
- 04-06-2026PublishedVulnerability first disclosed.
- 08-06-2026Last modifiedVulnerability information updated.
Description
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.0.17, `go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaks one file descriptor on each successful `ParseFile` call. `ParseFile` opens the schema file and passes it to `Parse` without closing it; repeated parsing in a long-running process can exhaust the process file descriptor limit and cause denial of service. Exploitation depends on a consuming application exposing repeated schema parsing to an attacker-controlled path. Version 0.0.17 contains a patch for the issue.
CVSS metrics
8 scores · 6 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated2.1LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- OSV · GoEcosystem advisory · calculated2.1LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- NVDNIST2.1LowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- OSV · Red hatEcosystem advisory · calculated4.0MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
6%
Versus all other CVEs
30-day change
Decrease -0.01 pp
From 0.18% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundOpentelemetry Go
Maturity: poc
Weaknesses
CWE · root cause- CWE-772Missing Release of Resource after Effective LifetimeThe product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
- CWE-775Missing Release of File Descriptor or Handle after Effective LifetimeThe product does not release a file descriptor or handle after its effective lifetime has ended, i.e., after the file descriptor/handle is no longer needed.
Affected systems
Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat14 products
- buildah< 0:1.44.0-1.hum1
- buildah-tests< 0:1.44.0-1.hum1
- caddy< 0:2.11.4-0.1.hum1
- containers-common< 0:0.67.0-1.1.hum1
- containers-common-extra< 0:0.67.0-1.1.hum1
Go.opentelemetry.io/otel/schema2 products
- v1.0< 0.0.17
- v1.1< 0.0.17
Open-telemetry2 products
Debian1 product
- golang-opentelemetry-otelAll versions (No fix recorded) | < 1.46.0-2
Go.opentelemetry.io/otel1 product
- schema< 0.0.17
Opentelemetry1 product
- telemetry_schema_files< 0.0.17
Ubuntu1 product
- golang-opentelemetry-otelAll versions (No fix recorded)
7 vendors · 22 products
References
24 links- github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-995v-fvrw-c78mX Refsource CONFIRMARTICLEREPORTWEBAdvisoryExploitVendor Advisory
- github.com/open-telemetry/opentelemetry-go/commit/e72a235518cb773137efd80336a179028bc34684X Refsource MISCARTICLEWEBPatch
- github.com/open-telemetry/opentelemetry-go/commit/f12d198f161b61735d65705248715aa97021ba8dX Refsource MISCARTICLEWEBPatch
- images.redhat.comARTICLE
