CVE-2026-54552

HIGHPre-NVD 7.97.9—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% 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, secondary
7.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.9Exploit: None knownExposed: 0

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

sh provides Python process launching. Prior to 2.2.4, the _uid option in sh.py performs an incomplete privilege drop on Linux and Unix-like systems. When sh runs from an elevated process and launches a command with _uid set to an unprivileged user, the child changes its UID but can retain the parent process's supplementary groups because the privilege-drop sequence does not fully establish the target user's UID, primary GID, and supplementary groups. The child can therefore retain access to files or resources granted to privileged groups such as root, docker, disk, shadow, or sudo, violating the expected _uid privilege boundary. This issue is fixed in version 2.2.4.

CVSS v3
7.9
EG Score
7.9(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity79% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

July 17, 2026

Last Modified

August 18, 2026

Advisory Details (4)

Auto-updated Aug 18, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

Release 2.2.4

Patch available: amoffat/sh 2.2.4

https://github.com/amoffat/sh/releases/tag/2.2.4
github_commit Patch Available

commit 3d855daba91f (amoffat/sh)

Patch available: amoffat/sh 2.2.4 (contains commit 3d855daba91f)

https://github.com/amoffat/sh/commit/3d855daba91f87a089b490c0d1cf1df3faace2f1
github_pr Patch Available

gid regression and priv tests

Patch available: amoffat/sh 2.2.4 (PR #776 merged 2026-06-06)

https://github.com/amoffat/sh/pull/776
github Patch Available

sh _uid does not drop supplementary groups (incomplete privilege drop) · Advisory · amoffat/sh · GitHub

https://github.com/amoffat/sh/security/advisories/GHSA-q38v-wp89-2w55

Vendor Advisories for CVE-2026-54552(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-sh1.14.2-1, 2.0.7-1, 2.2.1-1, 2.2.1-2——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-sh2.2.1-1, 2.2.1-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-sh2.2.1-1, 2.2.1-2——
PyPI(1)
PackageVulnerable rangeFixed inDependents
sh0.01 ... 2.2.3 (50 versions)2.2.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-08 00:00 UTCEG score recompute
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-05 20:26 UTCEG score recompute
  8. 2026-09-04 05:06 UTCEPSS rescore
  9. 2026-09-01 13:54 UTCEPSS rescore
  10. 2026-09-01 04:40 UTCEPSS rescore
  11. 2026-08-31 05:42 UTCEG score recompute
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 03:16 UTCEG score recompute
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-27 21:25 UTCEG score recompute
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 01:04 UTCEG score recompute
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 22:34 UTCEG score recompute
  21. 2026-08-23 06:57 UTCEG score recompute
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-22 04:28 UTCEG score recompute
  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-21 01:57 UTCEG score recompute
Show 10 more
  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-19 23:27 UTCEG score recompute
  3. 2026-08-19 17:04 UTCEPSS rescore
  4. 2026-08-18 19:25 UTCEG score recompute
  5. 2026-08-18 19:07 UTCEG score recompute
  6. 2026-08-18 18:25 UTCEG score recompute
  7. 2026-07-30 09:29 UTCEG score recompute
  8. 2026-07-26 11:18 UTCEG score recompute
  9. 2026-07-23 03:19 UTCEG score recompute
  10. 2026-07-17 19:00 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-54552?
CVE-2026-54552 is a high vulnerability published on July 17, 2026. sh provides Python process launching. Prior to 2.2.4, the uid option in sh.py performs an incomplete privilege drop on Linux and Unix-like systems. When sh runs from an elevated process and launches a command with uid set to an unprivileged user, the child changes its UID but can retain the parent…
When was CVE-2026-54552 disclosed?
CVE-2026-54552 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54552 actively exploited?
CVE-2026-54552 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 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-54552?
CVE-2026-54552 has a CVSS v3 base score of 7.9 (NVD).
How do I remediate CVE-2026-54552?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54552, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54552

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