CVE-2026-45739

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 87% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Strawberry GraphQL is a library for creating GraphQL APIs. In versions 0.288.4 through 0.315.3, Strawberry's bundled GraphiQL template wrote values from the GraphiQL headers editor into the browser URL query string. If a user entered a sensitive header, such as Authorization: Bearer , the value could become visible in browser history, copied links, and server/proxy/CDN access logs after a page reload or shared request. Version 0.315.4 patches the issue.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

Published

May 19, 2026

Last Modified

July 22, 2026

Advisory Details (5)

Auto-updated Jun 16, 2026
Patch available. Sources: github_pr, github_release, github, github_commit.
githubMentions a patch (unverified)

Default GraphiQL may expose HTTP headers in URLs · Advisory · strawberry-graphql/strawberry · GitHub

https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-x97m-qp5c-w9xj
github_release Patch Available

0.315.4

Patch available: strawberry-graphql/strawberry 0.315.4

https://github.com/strawberry-graphql/strawberry/releases/tag/0.315.4
github_pr Patch Available

added url sharing for graphiql

Patch available: strawberry-graphql/strawberry 0.308.1 (PR #2842 merged 2026-01-12)

https://github.com/strawberry-graphql/strawberry/pull/2842
generic

Bundled Graphiql Writes Headers To URL · Issue #4398 · strawberry-graphql/strawberry · GitHub

https://github.com/strawberry-graphql/strawberry/issues/4398
github_commit Patch Available

commit 9315ef80a621 (strawberry-graphql/strawberry)

Patch available: strawberry-graphql/strawberry 0.308.1 (contains commit 9315ef80a621)

https://github.com/strawberry-graphql/strawberry/commit/9315ef80a621ae50ca0bc5c82f560ca4ee7e47a9

Vendor Advisories for CVE-2026-45739(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
strawberry-graphql0.288.4 ... 0.315.3 (64 versions)
  • 0.288.4 up to 0.315.4: fixed in 0.315.4
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 148 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2026-45739?
CVE-2026-45739 is a medium vulnerability published on May 19, 2026. Strawberry GraphQL is a library for creating GraphQL APIs. In versions 0.288.4 through 0.315.3, Strawberry's bundled GraphiQL template wrote values from the GraphiQL headers editor into the browser URL query string. If a user entered a sensitive header, such as Authorization: Bearer <token>, the…
When was CVE-2026-45739 disclosed?
CVE-2026-45739 was first published on May 19, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45739 actively exploited?
CVE-2026-45739 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45739?
CVE-2026-45739 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-45739?
A fix for CVE-2026-45739 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-45739 are linked in the Vendor Advisories panel on this page.

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