CVE-2026-44657

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 72% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability is fixed in 2.28.2.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

May 28, 2026

Last Modified

July 21, 2026

Advisory Details (4)

Auto-updated May 29, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic Patch Available🟡 PoC Available

0037020: CVE-2026-44657: Stored XSS in File Download - MantisBT

https://mantisbt.org/bugs/view.php?id=37020
github Patch Available

Stored XSS in File Download · Advisory · mantisbt/mantisbt · GitHub

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-p6fr-rxq7-xcg8
github Patch Available

Content Security Policy bypass via attachments · Advisory · mantisbt/mantisbt · GitHub

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-9c3j-xm6v-j7j3
github_commit

commit 26647b2e68ba (mantisbt/mantisbt)

Fix landed in mantisbt/mantisbt commit 26647b2e68ba — awaiting tagged release

https://github.com/mantisbt/mantisbt/commit/26647b2e68ba30b9d7987d4e03d7a16416684bc2

Vendor Advisories for CVE-2026-44657(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)
Packagist(1)
PackageVulnerable rangeFixed inDependents
mantisbt/mantisbt2.10.0 ... 2.9.1 (76 versions)2.28.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 45× 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 108 total refreshes for this CVE.

  1. 2026-08-15 01:30 UTCEPSS rescore
  2. 2026-08-14 00:49 UTCEG score recompute
  3. 2026-08-13 22:00 UTCEPSS rescore
  4. 2026-08-12 20:38 UTCEG score recompute
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  6. 2026-08-11 22:24 UTCEG score recompute
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  13. 2026-08-07 17:15 UTCEG score recompute
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  15. 2026-08-06 13:46 UTCEPSS rescore
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  21. 2026-08-03 16:05 UTCEG score recompute
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  24. 2026-08-02 02:27 UTCEPSS rescore
  25. 2026-08-01 14:21 UTCEG score recompute
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  1. 2026-08-01 04:16 UTCEPSS rescore
  2. 2026-07-31 06:11 UTCEG score recompute
  3. 2026-07-30 16:28 UTCEPSS rescore
  4. 2026-07-30 01:30 UTCEPSS rescore
  5. 2026-07-29 12:25 UTCEG score recompute
  6. 2026-07-28 15:36 UTCEPSS rescore
  7. 2026-07-27 14:13 UTCEPSS rescore
  8. 2026-07-27 09:32 UTCEG score recompute
  9. 2026-07-26 14:54 UTCEPSS rescore
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  11. 2026-07-25 14:18 UTCEPSS rescore
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  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 03:15 UTCEG score recompute
  15. 2026-07-22 14:08 UTCEPSS rescore
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  17. 2026-07-19 14:31 UTCEPSS rescore
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  21. 2026-07-15 16:57 UTCEPSS rescore
  22. 2026-07-15 02:00 UTCEPSS rescore
  23. 2026-07-13 22:30 UTCEPSS rescore
  24. 2026-07-13 06:13 UTCEPSS rescore
  25. 2026-07-12 05:46 UTCEPSS rescore
  26. 2026-07-11 08:27 UTCEPSS rescore
  27. 2026-07-09 19:10 UTCEPSS rescore
  28. 2026-07-08 15:16 UTCEPSS rescore
  29. 2026-07-07 13:46 UTCEPSS rescore
  30. 2026-07-06 16:27 UTCEPSS rescore
  31. 2026-07-06 02:23 UTCEPSS rescore
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  35. 2026-06-30 23:22 UTCEPSS rescore
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  39. 2026-06-28 04:56 UTCEPSS rescore
  40. 2026-06-27 03:08 UTCEPSS rescore
  41. 2026-06-25 13:49 UTCEPSS rescore
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  43. 2026-06-24 14:05 UTCEPSS rescore
  44. 2026-06-23 21:33 UTCEPSS rescore
  45. 2026-06-22 14:25 UTCEPSS rescore
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  47. 2026-06-21 14:56 UTCEPSS rescore
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  49. 2026-06-21 01:59 UTCEPSS rescore
  50. 2026-06-19 19:25 UTCEPSS rescore
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  63. 2026-06-08 14:17 UTCEPSS rescore
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  65. 2026-06-07 15:25 UTCEPSS rescore
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  67. 2026-06-06 13:47 UTCEPSS rescore
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  69. 2026-06-05 22:47 UTCEPSS rescore
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  72. 2026-06-04 13:12 UTCEPSS rescore
  73. 2026-06-04 13:12 UTCEPSS rescore
  74. 2026-06-02 20:13 UTCEPSS rescore
  75. 2026-06-01 13:52 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44657?
CVE-2026-44657 is a high vulnerability published on May 28, 2026. Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using showinline=1 parameter and a valid fileshowinlinetoken CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability…
When was CVE-2026-44657 disclosed?
CVE-2026-44657 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44657 actively exploited?
CVE-2026-44657 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 72.1% of all scored CVEs.
What is the CVSS score of CVE-2026-44657?
CVE-2026-44657 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-44657?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44657, 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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