CVE-2026-34977

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 45% 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Aperi'Solve is an open-source steganalysis web platform. In versions 3.1.3 through 3.2.0, when uploading a JPEG, a user can specify an optional password to accompany the JPEG. This password is then directly passed into an expect command, which is then subsequently passed into a bash -c command, without any form of sanitization or validation. An unauthenticated attacker can achieve root-level RCE inside the worker container with a single HTTP request, enabling full read/write access to all user-uploaded images, analysis results, and plaintext steganography passwords stored on disk. Because the container shares a Docker network with PostgreSQL and Redis (no authentication on either), the attacker can pivot to dump the entire database or manipulate the job queue to poison results for other users. If Docker socket mounting or host volume mounts are present, this could escalate to full host compromise. This would also include defacement of the website itself. This vulnerability is fixed in 3.2.1.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
51.6%
KEV
Not listed

Published

April 6, 2026

Last Modified

June 23, 2026

Advisory Details (7)

Auto-updated Jul 12, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Unauthenticated RCE via JPSeek Analyzer Command · Advisory · Zeecka/AperiSolve · GitHub

https://github.com/Zeecka/AperiSolve/security/advisories/GHSA-8r22-62p7-9jrp
github_release Patch Available

3.2.1

Patch available: Zeecka/AperiSolve 3.2.1

https://github.com/Zeecka/AperiSolve/releases/tag/3.2.1
github_release Patch Available

3.1.3

Patch available: Zeecka/AperiSolve 3.1.3

https://github.com/Zeecka/AperiSolve/releases/tag/3.1.3
github_pr Patch Available

Fix shell injection in jpseek analyzer via password field

Patch available: Zeecka/AperiSolve 3.2.1 (PR #195 merged 2026-03-30)

https://github.com/Zeecka/AperiSolve/pull/195
github_pr Patch Available

Adding jphide analyzer

Patch available: Zeecka/AperiSolve 3.1.3 (PR #173 merged 2026-01-13)

https://github.com/Zeecka/AperiSolve/pull/173
github_commit Patch Available

commit 0193ca4a7d8a (Zeecka/AperiSolve)

Patch available: Zeecka/AperiSolve 3.2.1 (contains commit 0193ca4a7d8a)

https://github.com/Zeecka/AperiSolve/commit/0193ca4a7d8ae9d6ba6cde82d37a6f94953463b4
generic

AperiSolve/aperisolve/analyzers/jpseek.py at 9fc388c629f86221bf2a265559eba5650d39fc29 · Zeecka/AperiSolve · GitHub

https://github.com/Zeecka/AperiSolve/blob/9fc388c629f86221bf2a265559eba5650d39fc29/aperisolve/analyzers/jpseek.py

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 44× 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 117 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-06-27 03:08 UTCEPSS rescore
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  7. 2026-06-23 02:00 UTCNVD updateCVSS v3 → 9.8
  8. 2026-06-23 00:00 UTCMITRE cvelistV5CVSS v3 → 9.3
  9. 2026-06-22 14:25 UTCEPSS rescore
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  25. 2026-06-12 05:05 UTCEG score recompute
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Frequently asked(5)

What is CVE-2026-34977?
CVE-2026-34977 is a critical vulnerability published on April 6, 2026. Aperi'Solve is an open-source steganalysis web platform. In versions 3.1.3 through 3.2.0, when uploading a JPEG, a user can specify an optional password to accompany the JPEG. This password is then directly passed into an expect command, which is then subsequently passed into a bash -c command,…
When was CVE-2026-34977 disclosed?
CVE-2026-34977 was first published in the National Vulnerability Database on April 6, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34977 actively exploited?
CVE-2026-34977 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34977?
CVE-2026-34977 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-34977?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34977, 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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