CVE-2026-49836

MEDIUMPre-NVD 4.64.6—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 95% 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
Elevated
4.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.6Exploit: Elevated riskExposed: 0

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

psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to version 1.17.1, SmartObject.save() writes an embedded smart object to a path taken verbatim from the PSD file. Because that name is attacker-controlled and unsanitised, a tool that extracts embedded objects from an untrusted .psd can be made to write attacker-chosen bytes to an attacker-chosen path (absolute or ../-traversing), outside its intended output directory. A secondary issue in SmartObject.open() for external-kind smart objects allows the attacker-controlled fullPath descriptor to be used as an arbitrary file read path, enabling exfiltration of the read content to the controlled write destination. Both issues are fixed in v1.17.1.

CVSS v3
4.6
EG Score
4.6(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity46% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

July 9, 2026

Last Modified

September 11, 2026

Advisory Details (4)

Auto-updated Sep 10, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release, github.
github_release Patch Available

Release v1.17.1

Patch available: psd-tools/psd-tools v1.17.1

http://github.com/psd-tools/psd-tools/releases/tag/v1.17.1
generic🟡 PoC Available

advisory-database/vulns/psd-tools/PYSEC-2026-2969.yaml at main · pypa/advisory-database · GitHub

https://github.com/pypa/advisory-database/tree/main/vulns/psd-tools/PYSEC-2026-2969.yaml
github_pr Patch Available

fix(security): arbitrary file write/read via SmartObject path traversal (GHSA-2rmg-vrx8-9j2f)

Patch available: psd-tools/psd-tools v1.17.1 (PR #657 merged 2026-05-26)

https://github.com/psd-tools/psd-tools/pull/657
github Patch Available🟡 PoC Available

psd-tools: arbitrary file write/read via smart-object filename · Advisory · psd-tools/psd-tools · GitHub

https://github.com/psd-tools/psd-tools/security/advisories/GHSA-2rmg-vrx8-9j2f

Vendor Advisories for CVE-2026-49836(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 rangeFixed inDependents
psd-tools0.1.1 ... 1.9.9 (115 versions)1.17.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 13× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 05:26 UTCEG score recompute
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-14 09:25 UTCEG score recompute
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-13 08:16 UTCEG score recompute
  8. 2026-09-11 18:36 UTCEG score recompute
  9. 2026-09-11 17:22 UTCEG score recompute
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-10 22:20 UTCEG score recompute
  12. 2026-09-10 21:55 UTCEG score recompute▲ 4.60
  13. 2026-09-10 21:54 UTCMITRE cvelistV5CVSS v3 → 4.6 · CVSS v4 → 4.6
  14. 2026-08-01 19:38 UTCEG score recompute
  15. 2026-07-26 12:14 UTCEG score recompute
  16. 2026-07-23 03:18 UTCEG score recompute
  17. 2026-07-09 23:46 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-49836?
CVE-2026-49836 is a medium vulnerability published on July 9, 2026. psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to version 1.17.1, SmartObject.save() writes an embedded smart object to a path taken verbatim from the PSD file. Because that name is attacker-controlled and unsanitised, a tool that extracts embedded objects from an…
When was CVE-2026-49836 disclosed?
CVE-2026-49836 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49836 actively exploited?
CVE-2026-49836 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 94.8% of all scored CVEs.
What is the CVSS score of CVE-2026-49836?
CVE-2026-49836 has a CVSS v3 base score of 4.6 (NVD).
How do I remediate CVE-2026-49836?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49836, 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-2026-49836

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