CVE-2026-41309

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 71% 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
Trending — 3 sources updated this week
8.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.2Exploit: NoneExposed: 0

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

Open Source Social Network (OSSN) is open-source social networking software developed in PHP. Versions prior to 9.0 are vulnerable to resource exhaustion. An attacker can upload a specially crafted image with extreme pixel dimensions (e.g., $10000 \times 10000$ pixels). While the compressed file size on disk may be small, the server attempts to allocate significant memory and CPU cycles during the decompression and resizing process, leading to a Denial of Service (DoS) condition. It is highly recommended to upgrade to OSSN 9.0. This version introduces stricter validation of image dimensions and improved resource management during the processing phase. Those who cannot upgrade immediately can mitigate the risk by adjusting their php.ini settings to strictly limit memory_limit and max_execution_time and/or implementing a client-side and server-side check on image headers to reject files exceeding reasonable pixel dimensions (e.g., $4000 \times 4000$ pixels) before processing begins.

CVSS v3
8.2
EG Score
8.2(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
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
29.4%
KEV
Not listed

Published

April 24, 2026

Last Modified

April 29, 2026

Advisory Details (3)

Auto-updated Apr 29, 2026
Patch available. Sources: github.
github Patch Available

Resource Exhaustion via Malicious Image Processing · Advisory · opensource-socialnetwork/opensource-socialnetwork · GitHub

https://github.com/opensource-socialnetwork/opensource-socialnetwork/security/advisories/GHSA-72qf-xrcw-fhr2
generic

[E] Limit the width and height for the images upload to avoid resources overusage CWE-400 · Issue #2535 · opensource-socialnetwork/opensource-socialnetwork · GitHub

https://github.com/opensource-socialnetwork/opensource-socialnetwork/issues/2535
generic

[E] Limit the width and height for the images upload to avoid resourc… · opensource-socialnetwork/opensource-socialnetwork@1235711 · GitHub

https://github.com/opensource-socialnetwork/opensource-socialnetwork/commit/12357113b3be189da7f6e429979a464e4f982117

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 34× 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. 2026-07-24 14:17 UTCEPSS rescore
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  58. 2026-05-20 15:56 UTCEG score recompute
  59. 2026-05-20 11:22 UTCEPSS rescore
  60. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41309?
CVE-2026-41309 is a high vulnerability published on April 24, 2026. Open Source Social Network (OSSN) is open-source social networking software developed in PHP. Versions prior to 9.0 are vulnerable to resource exhaustion. An attacker can upload a specially crafted image with extreme pixel dimensions (e.g., $10000 \times 10000$ pixels). While the compressed file…
When was CVE-2026-41309 disclosed?
CVE-2026-41309 was first published in the National Vulnerability Database on April 24, 2026, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41309 actively exploited?
CVE-2026-41309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41309?
CVE-2026-41309 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-41309?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41309, 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

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