CVE-2023-22726

HIGHNVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.0 under NVD CVSS v3. EPSS exploit probability: 1.3%, top 34% 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
Elevated
8.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.0Exploit: Elevated riskExposed: 0

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

act is a project which allows for local running of github actions. The artifact server that stores artifacts from Github Action runs does not sanitize path inputs. This allows an attacker to download and overwrite arbitrary files on the host from a Github Action. This issue may lead to privilege escalation. The /upload endpoint is vulnerable to path traversal as filepath is user controlled, and ultimately flows into os.Mkdir and os.Open. The /artifact endpoint is vulnerable to path traversal as the path is variable is user controlled, and the specified file is ultimately returned by the server. This has been addressed in version 0.2.40. Users are advised to upgrade. Users unable to upgrade may, during implementation of Open and OpenAtEnd for FS, ensure to use ValidPath() to check against path traversal or clean the user-provided paths manually.

CVSS v3
8.0
EG Score
8.0(medium)
EG Risk
52(Track*)
EG Risk 52/100SSVC: 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
Severity80% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
68%
KEV
Not listed

Published

January 20, 2023

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated Sep 21, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic

act/pkg/artifacts/server.go at v0.2.35 · nektos/act · GitHub

https://github.com/nektos/act/blob/v0.2.35/pkg/artifacts/server.go#LL103C2-L103C2
generic

act/pkg/artifacts/server.go at v0.2.35 · nektos/act · GitHub

https://github.com/nektos/act/blob/v0.2.35/pkg/artifacts/server.go#L245
generic

act/pkg/artifacts/server.go at master · nektos/act · GitHub

https://github.com/nektos/act/blob/master/pkg/artifacts/server.go#L65
github🟡 PoC Available

GHSL-2023-004: Arbitrary file upload and download in act - CVE-2023-22726 | GitHub Security Lab

https://securitylab.github.com/advisories/GHSL-2023-004_act/
github Patch Available🟡 PoC Available

Github Security Lab: GHSL-2023-004 · Advisory · nektos/act · GitHub

https://github.com/nektos/act/security/advisories/GHSA-pc99-qmg4-rcff
generic

Github Security Lab: GHSL-2023-004 · Issue #1553 · nektos/act · GitHub

https://github.com/nektos/act/issues/1553
github_commit

commit 63ae215071f9 (nektos/act)

Fix landed in nektos/act commit 63ae215071f9 — awaiting tagged release

https://github.com/nektos/act/commit/63ae215071f94569d910964bdee866d91d6e3a10

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/nektos/act—0.2.40—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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 171 total refreshes for this CVE.

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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-22726?
CVE-2023-22726 is a high vulnerability published on January 20, 2023. act is a project which allows for local running of github actions. The artifact server that stores artifacts from Github Action runs does not sanitize path inputs. This allows an attacker to download and overwrite arbitrary files on the host from a Github Action. This issue may lead to privilege…
When was CVE-2023-22726 disclosed?
CVE-2023-22726 was first published in the National Vulnerability Database on January 20, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-22726 actively exploited?
CVE-2023-22726 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 31.8% of all scored CVEs.
What is the CVSS score of CVE-2023-22726?
CVE-2023-22726 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2023-22726?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-22726, 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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