CVE-2026-7845

LOWNVD 2.62.6—
EchelonGraph scoreMEDIUM confidence

Score 2.6 from GitHub Security Advisory (severity: LOW) published 2026-05-05. NVD baseline CVSS 2.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
2.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 2.6Exploit: NoneExposed: 0

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

A flaw has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This issue affects the function PIL.Image.tobytes of the file libs/chatchat-server/chatchat/webui_pages/dialogue/dialogue.py of the component Vision Chat Paste Image Handler. This manipulation of the argument paste_image.image_data causes use of weak hash. The attacker needs to be present on the local network. The attack is considered to have high complexity. The exploitability is assessed as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
2.6
EG Score
2.6(medium)
EPSS
3.7%
KEV
Not listed

Published

May 5, 2026

Last Modified

May 5, 2026

References (7)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
piplangchain-chatchat—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
langchain-chatchat0.3.0 ... 0.3.1.3 (22 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 32× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:31 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-08 15:16 UTCEPSS rescore
  10. 2026-07-08 15:16 UTCEPSS rescore
  11. 2026-07-07 13:46 UTCEPSS rescore
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 06:31 UTCEPSS rescore
  16. 2026-07-04 06:31 UTCEPSS rescore
  17. 2026-07-01 15:07 UTCEPSS rescore
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-29 14:06 UTCEPSS rescore
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-27 03:08 UTCEPSS rescore
  23. 2026-06-25 13:50 UTCEPSS rescore
  24. 2026-06-24 14:05 UTCEPSS rescore
  25. 2026-06-23 21:33 UTCEPSS rescore
Show 47 more
  1. 2026-06-22 14:25 UTCEPSS rescore
  2. 2026-06-21 14:56 UTCEPSS rescore
  3. 2026-06-21 01:59 UTCEPSS rescore
  4. 2026-06-19 19:26 UTCEPSS rescore
  5. 2026-06-18 17:52 UTCEPSS rescore
  6. 2026-06-17 17:53 UTCEPSS rescore
  7. 2026-06-16 17:53 UTCEPSS rescore
  8. 2026-06-15 17:49 UTCEPSS rescore
  9. 2026-06-15 17:49 UTCEPSS rescore
  10. 2026-06-14 23:18 UTCEPSS rescore
  11. 2026-06-14 07:51 UTCEG score recompute
  12. 2026-06-14 07:51 UTCGHSA enrichment
  13. 2026-06-13 23:00 UTCEPSS rescore
  14. 2026-06-12 23:12 UTCEPSS rescore
  15. 2026-06-12 23:12 UTCEPSS rescore
  16. 2026-06-11 14:00 UTCEPSS rescore
  17. 2026-06-10 22:19 UTCEPSS rescore
  18. 2026-06-10 13:22 UTCEPSS rescore
  19. 2026-06-10 11:42 UTCEG score recompute
  20. 2026-06-10 11:42 UTCGHSA enrichment
  21. 2026-06-08 14:17 UTCEPSS rescore
  22. 2026-06-07 15:25 UTCEPSS rescore
  23. 2026-06-07 11:04 UTCEG score recompute
  24. 2026-06-07 11:04 UTCGHSA enrichment
  25. 2026-06-06 13:47 UTCEPSS rescore
  26. 2026-06-05 22:47 UTCEPSS rescore
  27. 2026-06-05 06:10 UTCEPSS rescore
  28. 2026-06-04 13:12 UTCEPSS rescore
  29. 2026-06-04 10:27 UTCEG score recompute
  30. 2026-06-04 10:27 UTCGHSA enrichment
  31. 2026-06-02 20:13 UTCEPSS rescore
  32. 2026-06-01 13:52 UTCEPSS rescore
  33. 2026-06-01 09:49 UTCEG score recompute
  34. 2026-06-01 09:49 UTCGHSA enrichment
  35. 2026-05-31 22:30 UTCEPSS rescore
  36. 2026-05-31 00:16 UTCEPSS rescore
  37. 2026-05-29 13:44 UTCEPSS rescore
  38. 2026-05-28 13:44 UTCEPSS rescore
  39. 2026-05-27 13:40 UTCEPSS rescore
  40. 2026-05-27 13:40 UTCEPSS rescore
  41. 2026-05-26 13:44 UTCEPSS rescore
  42. 2026-05-26 07:18 UTCEPSS rescore
  43. 2026-05-21 22:43 UTCEPSS rescore
  44. 2026-05-20 22:38 UTCEPSS rescore
  45. 2026-05-20 14:26 UTCEG score recompute
  46. 2026-05-20 14:26 UTCGHSA enrichment
  47. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-7845?
CVE-2026-7845 is a low vulnerability published on May 5, 2026. A flaw has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This issue affects the function PIL.Image.tobytes of the file libs/chatchat-server/chatchat/webuipages/dialogue/dialogue.py of the component Vision Chat Paste Image Handler. This manipulation of the argument…
When was CVE-2026-7845 disclosed?
CVE-2026-7845 was first published in the National Vulnerability Database on May 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7845 actively exploited?
CVE-2026-7845 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-7845?
CVE-2026-7845 has a CVSS v3 base score of 2.6 (NVD).
How do I remediate CVE-2026-7845?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7845, 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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