CVE-2026-42150

MEDIUMNVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 93% 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

wlc is a Weblate command-line client using Weblate's REST API. Prior to version 2.0.0, the HTML output format in wlc embeds API response data into HTML without escaping, allowing cross-site scripting when the output is rendered in a browser. This issue has been patched in version 2.0.0.

CVSS v3
5.1
EG Score
5.1(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: Track

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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 12, 2026

Advisory Details (4)

Auto-updated May 8, 2026
Patch available. Sources: github.
github Patch Available

print_html outputs API data without HTML escaping, enabling stored XSS · Advisory · WeblateOrg/wlc · GitHub

https://github.com/WeblateOrg/wlc/security/advisories/GHSA-gx2m-mcc2-r4p3
generic

Release 2.0.0 · WeblateOrg/wlc · GitHub

https://github.com/WeblateOrg/wlc/releases/tag/2.0.0
generic

fix(output): properly escape generated HTML by nijel · Pull Request #1327 · WeblateOrg/wlc · GitHub

https://github.com/WeblateOrg/wlc/pull/1327
generic

fix(output): properly escape generated HTML (#1327) · WeblateOrg/wlc@0f3e58f · GitHub

https://github.com/WeblateOrg/wlc/commit/0f3e58f6d7457b05d48ef40f579a172c4c8b8469

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
wlc1.13-1 ... 2.0.0-1 (10 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
wlc1.13-2 ... 2.0.0-1 (7 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
wlc1.15-1, 1.15-2, 1.16.1-1, 1.17.2-1, 2.0.0-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
wlc1.15-1, 1.15-2, 1.16.1-1, 1.17.2-12.0.0-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
wlc0.0 ... 1.9 (31 versions)2.0.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 40× 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 133 total refreshes for this CVE.

  1. 2026-08-26 14:46 UTCEPSS rescore
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  3. 2026-08-23 19:30 UTCEG score recompute
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Frequently asked(5)

What is CVE-2026-42150?
CVE-2026-42150 is a medium vulnerability published on May 8, 2026. wlc is a Weblate command-line client using Weblate's REST API. Prior to version 2.0.0, the HTML output format in wlc embeds API response data into HTML without escaping, allowing cross-site scripting when the output is rendered in a browser. This issue has been patched in version 2.0.0.
When was CVE-2026-42150 disclosed?
CVE-2026-42150 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42150 actively exploited?
CVE-2026-42150 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.2% of all scored CVEs.
What is the CVSS score of CVE-2026-42150?
CVE-2026-42150 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-42150?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42150, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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